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The Amplitude integration enables automatic event tracking from your FunnelFox funnels directly into your existing Amplitude analytics setup. Amplitude’s built-in Session Replay feature provides full visibility into the customer journey, helping you understand how users interact with every step of your funnels.

​
Setup

To proceed with this setup, you need an active account in Amplitude.

​
1. Get your API key

  1. Go to Settings > Organization settings > Projects in your Amplitude dashboard.
  1. Open your project or create a new one.
  2. Click Show under API Key and copy the key.

​
2. Apply your API key

  1. Go to Integrations > Amplitude in FunnelFox.
  2. Paste your API key into the Amplitude Public API Key field.
  1. Click Save changes.
Your Amplitude integration is now active! Remember to republish your funnels to apply the changes.

​
3. Additional Amplitude (optional)

You can optionally add another Amplitude setup, if you have an additional instance.
  1. Toggle on Add Custom Amplitude.
  2. Set up at least one environment (production or sandbox):
  • URL: Paste your custom Amplitude server URL.
  • Api Key: Follow steps 1-2 of this section to paste your additional Api Key.
  1. Click Save changes.

​
Events

Amplitude receives the following events from FunnelFox:
EventDescription
Funnel navigation
onboarding_startedUser begins the funnel experience
onboarding_completedUser reaches a screen with final ID
screen_presentedUser views a screen
screen_completedUser navigates away from a screen
second_screen_presentedUser views the second screen
products_screen_presentedUser views paywall with Price Picker or Plan Picker elements
registration_screen_presentedUser views a screen with Email input or authentication
user_email_collectedUser entered a valid email
link_button_clickedExternal link is clicked
Purchases
checkout_screen_presentedUser views a screen with Checkout element
checkout_presentedUser views a Checkout element (can fire multiple times)
checkout_impressionCheckout is shown for the first time (once per session)
purchase_startedUser entered payment details and tapped Pay, or tapped one-click purchase button (Apple/Google Pay)
purchase_completed_successPayment succeeds
purchase_renewal_successRenewal payment succeeds
purchase_completed_failPayment fails
Subscriptions
subscription_createdSubscription is created for user
subscription_trialingSubscription enters trial period
subscription_activatedSubscription enters a paid period after trial
subscription_cycleRecurrent payment is paid for subscription
subscription_pausedSubscription billing was paused in PSP
subscription_cancelledSubscription was cancelled
subscription_unpaidRecurring subscription payment was not charged
Technical
checkout_init_errorCheckout initialization fails
variable_not_foundVariable placeholder has no assigned value
You can set up custom events to track in your funnel using Custom Code.
Enable Disable default events in your FunnelFox integration settings to preserve original event names and prevent Amplitude’s automatic conversions.

​
Example events

{
  "$insert_id": "01K9YZKXQVKW4HX4KDVCX65SDA",
  "$insert_key": null,
  "$schema": 13,
  "adid": null,
  "amplitude_attribution_ids": null,
  "amplitude_event_type": null,
  "amplitude_id": 1388328354445,
  "app": 757882,
  "city": "Amsterdam",
  "client_event_time": "2025-11-13 16:08:45.057000",
  "client_upload_time": "2025-11-13 16:08:46.886000",
  "country": "Netherlands",
  "data": {
    "group_first_event": {},
    "group_ids": {},
    "path": "/2/httpapi"
  },
  "data_type": "event",
  "device_brand": null,
  "device_carrier": null,
  "device_family": "Windows",
  "device_id": "fnlfx_01K9YZKN234GXFTK6J8PGPXSH4",
  "device_manufacturer": null,
  "device_model": null,
  "device_type": "Windows",
  "dma": null,
  "event_id": 78,
  "event_properties": {
    "onboarding": "demo-app",
    "sandbox": true
  },
  "event_time": "2025-11-13 16:08:45.057000",
  "event_type": "onboarding_started",
  "global_user_properties": {},
  "group_properties": {},
  "groups": {},
  "idfa": null,
  "ip_address": "193.124.206.155",
  "is_attribution_event": false,
  "isChildRow": false,
  "language": "English",
  "library": "amplitude-ts/2.11.13",
  "location_lat": null,
  "location_lng": null,
  "os": "Chrome 142",
  "os_name": "Chrome",
  "os_version": "142",
  "partner_id": null,
  "paying": null,
  "plan": {},
  "platform": "Web",
  "raw_event_type": "onboarding_started",
  "region": "North Holland",
  "sample_rate": null,
  "server_received_time": "2025-11-13 16:08:46.886000",
  "server_upload_time": "2025-11-13 16:08:46.894000",
  "session_id": 1763047575821,
  "source_id": null,
  "start_version": null,
  "user_creation_time": null,
  "user_id": null,
  "user_properties": {},
  "uuid": "1936ed99-a1e8-45ef-b376-8968efdaa4a1",
  "version_name": null
}

{
  "$insert_id": "01K9YYXCR8TZY6R2FSP7QYY8NS",
  "$insert_key": null,
  "$schema": 13,
  "adid": null,
  "amplitude_attribution_ids": null,
  "amplitude_event_type": null,
  "amplitude_id": 1388319792384,
  "app": 757882,
  "city": "Amsterdam",
  "client_event_time": "2025-11-13 15:56:26.798000",
  "client_upload_time": "2025-11-13 15:56:27.958000",
  "country": "Netherlands",
  "data": {
    "group_first_event": {},
    "group_ids": {},
    "path": "/2/httpapi"
  },
  "data_type": "event",
  "device_brand": null,
  "device_carrier": null,
  "device_family": "Windows",
  "device_id": "fnlfx_01K9YYW091ZYFZ55Y1CR0MFJ57",
  "device_manufacturer": null,
  "device_model": null,
  "device_type": "Windows",
  "dma": null,
  "event_id": 65,
  "event_properties": {
    "onboarding": "demo-app",
    "sandbox": true,
    "screen_cid": "final",
    "screen_id": "1AFzZhO9",
    "screen_index": 3
  },
  "event_time": "2025-11-13 15:56:26.798000",
  "event_type": "onboarding_completed",
  "global_user_properties": {},
  "group_properties": {},
  "groups": {},
  "idfa": null,
  "ip_address": "193.124.206.155",
  "is_attribution_event": false,
  "isChildRow": false,
  "language": "English",
  "library": "amplitude-ts/2.11.13",
  "location_lat": null,
  "location_lng": null,
  "os": "Chrome 142",
  "os_name": "Chrome",
  "os_version": "142",
  "partner_id": null,
  "paying": null,
  "plan": {},
  "platform": "Web",
  "raw_event_type": "onboarding_completed",
  "region": "North Holland",
  "sample_rate": null,
  "server_received_time": "2025-11-13 15:56:27.958000",
  "server_upload_time": "2025-11-13 15:56:27.964000",
  "session_id": 1763047575821,
  "source_id": null,
  "start_version": null,
  "user_creation_time": null,
  "user_id": null,
  "user_properties": {
    "email": "[email protected]"
  },
  "uuid": "8fb23b01-99b6-4608-b1a5-839e1e2515aa",
  "version_name": null
}

{
  "$insert_id": "01K9YX59DX6GG40H58M1QS7ZAY",
  "$insert_key": null,
  "$schema": 13,
  "adid": null,
  "amplitude_attribution_ids": null,
  "amplitude_event_type": null,
  "amplitude_id": 1388297800585,
  "app": 757882,
  "city": "Amsterdam",
  "client_event_time": "2025-11-13 15:25:48.378000",
  "client_upload_time": "2025-11-13 15:25:48.603000",
  "country": "Netherlands",
  "data": {
    "group_first_event": {},
    "group_ids": {},
    "path": "/2/httpapi"
  },
  "data_type": "event",
  "device_brand": null,
  "device_carrier": null,
  "device_family": "Windows",
  "device_id": "fnlfx_01K9YX4HWREFV6N7X1X1ZJ5Q2C",
  "device_manufacturer": null,
  "device_model": null,
  "device_type": "Windows",
  "dma": null,
  "event_id": 9,
  "event_properties": {
    "elements": "[Text, Button, Checkout]",
    "onboarding": "demo-app",
    "sandbox": false,
    "screen_cid": "wj1YA9nv",
    "screen_id": "wj1YA9nv",
    "screen_index": 1
  },
  "event_time": "2025-11-13 15:25:48.378000",
  "event_type": "screen_presented",
  "global_user_properties": {},
  "group_properties": {},
  "groups": {},
  "idfa": null,
  "ip_address": "193.124.206.155",
  "is_attribution_event": false,
  "isChildRow": false,
  "language": "English",
  "library": "amplitude-ts/2.11.13",
  "location_lat": null,
  "location_lng": null,
  "os": "Chrome 142",
  "os_name": "Chrome",
  "os_version": "142",
  "partner_id": null,
  "paying": null,
  "plan": {},
  "platform": "Web",
  "raw_event_type": "screen_presented",
  "region": "North Holland",
  "sample_rate": null,
  "server_received_time": "2025-11-13 15:25:48.603000",
  "server_upload_time": "2025-11-13 15:25:48.609000",
  "session_id": 1763047540782,
  "source_id": null,
  "start_version": null,
  "user_creation_time": null,
  "user_id": null,
  "user_properties": {
    "email": "[email protected]",
    "initial_dclid": "EMPTY",
    "initial_fbclid": "EMPTY",
    "initial_gbraid": "EMPTY",
    "initial_gclid": "EMPTY",
    "initial_ko_click_id": "EMPTY",
    "initial_li_fat_id": "EMPTY",
    "initial_msclkid": "EMPTY",
    "initial_referrer": "https://app.funnelfox.com/",
    "initial_referring_domain": "app.funnelfox.com",
    "initial_rtd_cid": "EMPTY",
    "initial_ttclid": "EMPTY",
    "initial_twclid": "EMPTY",
    "initial_utm_campaign": "EMPTY",
    "initial_utm_content": "EMPTY",
    "initial_utm_id": "EMPTY",
    "initial_utm_medium": "EMPTY",
    "initial_utm_source": "EMPTY",
    "initial_utm_term": "EMPTY",
    "initial_wbraid": "EMPTY",
    "referrer": "https://app.funnelfox.com/",
    "referring_domain": "app.funnelfox.com"
  },
  "uuid": "930c546b-fe89-430e-a183-cb904cb0c5b9",
  "version_name": null
}

    {
        "_time": 1764693230858,
        "$insert_id": "01KBFYKH7EP15KJZTPBF2V20H5",
        "$schema": 13,
        "amplitude_attribution_ids": null,
        "amplitude_id": 1406511815933,
        "app": 757882,
        "city": "Podgorica",
        "client_event_time": "2025-12-02 16:33:50.858000",
        "client_upload_time": "2025-12-02 16:33:51.290000",
        "country": "Montenegro",
        "data": {
        "group_first_event": {},
        "group_ids": {},
        "path": "/2/httpapi"
    },
        "device_carrier": null,
        "device_family": "Windows",
        "device_id": "fnlfx_01KBFYK16MHPXRZDAEP7RXDTQ5",
        "device_type": "Windows",
        "display_name": "screen_completed",
        "dma": null,
        "event_id": 158,
        "event_properties": {
        "onboarding": "translator-app",
        "reply": "Improve my communication",
        "sandbox": false,
        "screen_cid": "goals",
        "screen_id": "jHXsakwR",
        "screen_index": 1
    },
        "event_time": "2025-12-02 16:33:50.858000",
        "event_type": "screen_completed",
        "group_properties": {},
        "groups": {},
        "ip_address": "79.140.147.143",
        "language": "English",
        "library": "amplitude-ts/2.11.13",
        "location_lat": null,
        "location_lng": null,
        "os": "Chrome 142",
        "os_name": "Chrome",
        "os_version": "142",
        "partner_id": null,
        "paying": null,
        "plan": {},
        "platform": "Web",
        "processed_time": "2025-12-02 16:33:55.116000",
        "region": "Podgorica",
        "sample_rate": null,
        "server_received_time": "2025-12-02 16:33:51.290000",
        "server_upload_time": "2025-12-02 16:33:51.293000",
        "session_id": 1764693218593,
        "source_id": null,
        "start_version": null,
        "timeline_hidden": false,
        "user_id": null,
        "user_properties": {},
        "uuid": "a369ccea-c7cc-49e6-9356-7691d095e801",
        "version_name": null
    }

{
  "$insert_id": "01K9YX59DYQVWKN318PVYFP2MA",
  "$insert_key": null,
  "$schema": 13,
  "adid": null,
  "amplitude_attribution_ids": null,
  "amplitude_event_type": null,
  "amplitude_id": 1388297800585,
  "app": 757882,
  "city": "Amsterdam",
  "client_event_time": "2025-11-13 15:25:48.379000",
  "client_upload_time": "2025-11-13 15:25:48.603000",
  "country": "Netherlands",
  "data": {
    "group_first_event": {},
    "group_ids": {},
    "path": "/2/httpapi"
  },
  "data_type": "event",
  "device_brand": null,
  "device_carrier": null,
  "device_family": "Windows",
  "device_id": "fnlfx_01K9YX4HWREFV6N7X1X1ZJ5Q2C",
  "device_manufacturer": null,
  "device_model": null,
  "device_type": "Windows",
  "dma": null,
  "event_id": 10,
  "event_properties": {
    "onboarding": "demo-app",
    "sandbox": false,
    "screen_cid": "wj1YA9nv",
    "screen_id": "wj1YA9nv",
    "screen_index": 1
  },
  "event_time": "2025-11-13 15:25:48.379000",
  "event_type": "second_screen_presented",
  "global_user_properties": {},
  "group_properties": {},
  "groups": {},
  "idfa": null,
  "ip_address": "193.124.206.155",
  "is_attribution_event": false,
  "isChildRow": false,
  "language": "English",
  "library": "amplitude-ts/2.11.13",
  "location_lat": null,
  "location_lng": null,
  "os": "Chrome 142",
  "os_name": "Chrome",
  "os_version": "142",
  "partner_id": null,
  "paying": null,
  "plan": {},
  "platform": "Web",
  "raw_event_type": "second_screen_presented",
  "region": "North Holland",
  "sample_rate": null,
  "server_received_time": "2025-11-13 15:25:48.603000",
  "server_upload_time": "2025-11-13 15:25:48.609000",
  "session_id": 1763047540782,
  "source_id": null,
  "start_version": null,
  "user_creation_time": null,
  "user_id": null,
  "user_properties": {
    "email": "[email protected]",
    "initial_dclid": "EMPTY",
    "initial_fbclid": "EMPTY",
    "initial_gbraid": "EMPTY",
    "initial_gclid": "EMPTY",
    "initial_ko_click_id": "EMPTY",
    "initial_li_fat_id": "EMPTY",
    "initial_msclkid": "EMPTY",
    "initial_referrer": "https://app.funnelfox.com/",
    "initial_referring_domain": "app.funnelfox.com",
    "initial_rtd_cid": "EMPTY",
    "initial_ttclid": "EMPTY",
    "initial_twclid": "EMPTY",
    "initial_utm_campaign": "EMPTY",
    "initial_utm_content": "EMPTY",
    "initial_utm_id": "EMPTY",
    "initial_utm_medium": "EMPTY",
    "initial_utm_source": "EMPTY",
    "initial_utm_term": "EMPTY",
    "initial_wbraid": "EMPTY",
    "referrer": "https://app.funnelfox.com/",
    "referring_domain": "app.funnelfox.com"
  },
  "uuid": "e9faa8e8-940c-4c50-876f-bba979bd5c1f",
  "version_name": null
}

{
  "_time": 1763121227183,
  "$insert_id": "01KA13DS6F9J3W9VJHAB6BWV7E",
  "$schema": 13,
  "amplitude_attribution_ids": null,
  "amplitude_id": 1389197857516,
  "app": 757882,
  "city": "Amsterdam",
  "client_event_time": "2025-11-14 11:53:47.183000",
  "client_upload_time": "2025-11-14 11:53:49.223000",
  "country": "Netherlands",
  "data": {
    "group_first_event": {},
    "group_ids": {},
    "path": "/2/httpapi"
  },
  "device_carrier": null,
  "device_family": "Windows",
  "device_id": "fnlfx_01KA13DRJS4XY3391DR2C05H68",
  "device_type": "Windows",
  "display_name": "products_screen_presented",
  "dma": null,
  "event_id": 134,
  "event_properties": {
    "onboarding": "demo-app",
    "sandbox": true,
    "screen_cid": "QbfqbhE9",
    "screen_id": "QbfqbhE9",
    "screen_index": 0
  },
  "event_time": "2025-11-14 11:53:47.183000",
  "event_type": "products_screen_presented",
  "group_properties": {},
  "groups": {},
  "ip_address": "193.124.206.155",
  "language": "English",
  "library": "amplitude-ts/2.11.13",
  "location_lat": null,
  "location_lng": null,
  "os": "Chrome 142",
  "os_name": "Chrome",
  "os_version": "142",
  "partner_id": null,
  "paying": null,
  "plan": {},
  "platform": "Web",
  "processed_time": "2025-11-14 11:53:50.244000",
  "region": "North Holland",
  "sample_rate": null,
  "server_received_time": "2025-11-14 11:53:49.223000",
  "server_upload_time": "2025-11-14 11:53:49.233000",
  "session_id": 1763121034056,
  "source_id": null,
  "start_version": null,
  "timeline_hidden": false,
  "user_id": null,
  "user_properties": {},
  "uuid": "3e07590d-935c-496f-b1c1-231fc7ef2cd9",
  "version_name": null
}


{
  "$insert_id": "01K9YX4Y9NG8AX0KZ8177KR78D",
  "$insert_key": null,
  "$schema": 13,
  "adid": null,
  "amplitude_attribution_ids": null,
  "amplitude_event_type": null,
  "amplitude_id": 1388297800585,
  "app": 757882,
  "city": "Amsterdam",
  "client_event_time": "2025-11-13 15:25:40.790000",
  "client_upload_time": "2025-11-13 15:25:43.394000",
  "country": "Netherlands",
  "data": {
    "group_first_event": {},
    "group_ids": {},
    "path": "/2/httpapi"
  },
  "data_type": "event",
  "device_brand": null,
  "device_carrier": null,
  "device_family": "Windows",
  "device_id": "fnlfx_01K9YX4HWREFV6N7X1X1ZJ5Q2C",
  "device_manufacturer": null,
  "device_model": null,
  "device_type": "Windows",
  "dma": null,
  "event_id": 4,
  "event_properties": {
    "onboarding": "demo-app",
    "sandbox": false,
    "screen_cid": "QbfqbhE9",
    "screen_id": "QbfqbhE9",
    "screen_index": 0
  },
  "event_time": "2025-11-13 15:25:40.790000",
  "event_type": "registration_screen_presented",
  "global_user_properties": {},
  "group_properties": {},
  "groups": {},
  "idfa": null,
  "ip_address": "193.124.206.155",
  "is_attribution_event": false,
  "isChildRow": false,
  "language": "English",
  "library": "amplitude-ts/2.11.13",
  "location_lat": null,
  "location_lng": null,
  "os": "Chrome 142",
  "os_name": "Chrome",
  "os_version": "142",
  "partner_id": null,
  "paying": null,
  "plan": {},
  "platform": "Web",
  "raw_event_type": "registration_screen_presented",
  "region": "North Holland",
  "sample_rate": null,
  "server_received_time": "2025-11-13 15:25:43.394000",
  "server_upload_time": "2025-11-13 15:25:43.399000",
  "session_id": 1763047540782,
  "source_id": null,
  "start_version": null,
  "user_creation_time": null,
  "user_id": null,
  "user_properties": {
    "initial_dclid": "EMPTY",
    "initial_fbclid": "EMPTY",
    "initial_gbraid": "EMPTY",
    "initial_gclid": "EMPTY",
    "initial_ko_click_id": "EMPTY",
    "initial_li_fat_id": "EMPTY",
    "initial_msclkid": "EMPTY",
    "initial_referrer": "https://app.funnelfox.com/",
    "initial_referring_domain": "app.funnelfox.com",
    "initial_rtd_cid": "EMPTY",
    "initial_ttclid": "EMPTY",
    "initial_twclid": "EMPTY",
    "initial_utm_campaign": "EMPTY",
    "initial_utm_content": "EMPTY",
    "initial_utm_id": "EMPTY",
    "initial_utm_medium": "EMPTY",
    "initial_utm_source": "EMPTY",
    "initial_utm_term": "EMPTY",
    "initial_wbraid": "EMPTY",
    "referrer": "https://app.funnelfox.com/",
    "referring_domain": "app.funnelfox.com"
  },
  "uuid": "4f31b70b-f17c-478b-a6bf-1ef8e44edfa8",
  "version_name": null
}

{
  "$insert_id": "6937fd754ca32c91646d558a75098bde6976bc7e1d73fdd724c73094fcaf81db",
  "$insert_key": null,
  "$schema": 13,
  "adid": null,
  "amplitude_attribution_ids": null,
  "amplitude_event_type": null,
  "amplitude_id": 1388298157377,
  "app": 757882,
  "city": "Amsterdam",
  "client_event_time": "2025-11-13 15:26:18.395000",
  "client_upload_time": "2025-11-13 15:26:19.560000",
  "country": "Netherlands",
  "data": {
    "group_first_event": {},
    "group_ids": {},
    "path": "/2/httpapi"
  },
  "data_type": "event",
  "device_brand": null,
  "device_carrier": null,
  "device_family": "Windows",
  "device_id": "fnlfx_01K9YX62M8SJ1BR3AZBT52R53W",
  "device_manufacturer": null,
  "device_model": null,
  "device_type": "Windows",
  "dma": null,
  "event_id": 6,
  "event_properties": {
    "onboarding": "demo-app",
    "sandbox": true
  },
  "event_time": "2025-11-13 15:26:18.395000",
  "event_type": "user_email_collected",
  "global_user_properties": {},
  "group_properties": {},
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  "device_type": "Windows",
  "dma": null,
  "event_id": 38,
  "event_properties": {
    "onboarding": "demo-app",
    "sandbox": true,
    "variable": "name"
  },
  "event_time": "2025-11-13 15:55:27.204000",
  "event_type": "variable_not_found_error",
  "global_user_properties": {},
  "group_properties": {},
  "groups": {},
  "idfa": null,
  "ip_address": "193.124.206.155",
  "is_attribution_event": false,
  "isChildRow": false,
  "language": "English",
  "library": "amplitude-ts/2.11.13",
  "location_lat": null,
  "location_lng": null,
  "os": "Chrome 142",
  "os_name": "Chrome",
  "os_version": "142",
  "partner_id": null,
  "paying": null,
  "plan": {},
  "platform": "Web",
  "raw_event_type": "variable_not_found_error",
  "region": "North Holland",
  "sample_rate": null,
  "server_received_time": "2025-11-13 15:55:29.398000",
  "server_upload_time": "2025-11-13 15:55:29.405000",
  "session_id": 1763047575821,
  "source_id": null,
  "start_version": null,
  "user_creation_time": null,
  "user_id": null,
  "user_properties": {},
  "uuid": "390f90fd-f22f-4e75-a053-35e8deb95933",
  "version_name": null
}

​
Cross-domain tracking

Track users across multiple domains, such as your landing page and FunnelFox funnel. Amplitude uses device IDs to track users across domains. By default, FunnelFox generates device IDs using the fnlfx_ prefix and profile ID: fnlfx_{profile_id}. For cross-domain tracking, you need a consistent device ID across all domains. To set up cross-domain tracking:
  1. Go to Integrations > Amplitude in FunnelFox.
  2. Toggle on Cross-domain Device ID tracking.
  1. Get the device ID from amplitude.options.deviceId on your first domain (e.g., landing page), or use your own custom logic.
  2. Pass the device ID to your FunnelFox funnel using the URL parameter ampDeviceId or amp_device_id.
FunnelFox will use the passed device ID instead of generating a new one. If no device ID is passed, FunnelFox generates a new one automatically. Learn more about cross-domain tracking in Amplitude.

​
User identification

Amplitude identifies users with:
  • Device ID: fnlfx_{profile_id} - Consistent across sessions
  • User ID: Set when email is collected or custom ID provided
  • User properties: Email, profile ID, and custom attributes

​
Session replay

Session Replay lets you watch real user sessions from your funnels directly inside Amplitude, tied to the same events you’re already tracking. To enable Session replay:
  1. Go to Integrations > Amplitude in FunnelFox.
  2. Enable the Session Replay option.
  3. Set the percentage of sessions to replay as Sample Rate (from 0% to 100%).
  1. Click Save changes.

​
Testing

To make sure events are tracked as expected:
  1. Open your funnel in Preview mode.
  2. Go through the entire funnel flow.
  3. Simulate subscription management actions using test cards for your PSP.