Is migrating a fitness API integration hard?

It's usually a real re-integration, not a config change. Different providers expose different data shapes, auth models, and access rules, so a migration typically means re-mapping fields, standing up a new OAuth flow (or on-device permission), handling historical data, and asking users to reconnect. The playbooks here break each move into steps and flag where the effort actually lands.

How do I migrate without losing user data or connections?

Plan for continuity: keep the old integration reading while you stand up the new one, back-fill historical data where the new source allows it, and run a re-consent flow so users authorize the new connection before you cut over. Where possible, migrate users in waves and keep a rollback path. The 'keep users connected' playbook covers the sequencing.

Should I move to an aggregator or integrate directly?

An aggregator (Terra, Junction, Rook, Spike) gives you one integration across many devices, which cuts per-vendor work — at a recurring cost and some loss of control. Direct integrations mean more maintenance but no middleman and full access to each provider's data. The direct-to-aggregator and aggregator-to-direct playbooks walk both directions so you can decide by trade-off.

Migrations

Fitness & Health API Migration Guides

Migrating a fitness or health integration is usually a real re-integration: you re-map data fields, stand up new auth, deal with historical data, and ask users to reconnect. Each playbook below takes one move — a deprecation, a switch to or from an aggregator, or an architecture change — and walks it step by step, with links to the decision and integration guides.

Still deciding whether to move or what to move to? Start with the alternatives pages for the decision, or troubleshooting if an API just broke. Once you know the target, each playbook here links to its integration guide.

Platform & deprecation moves

Forced migrations off winding-down APIs.

Architecture moves

Change how you source and receive data.

Adapt & keep users connected

Ride out API changes without losing connections.

Frequently asked questions

Is migrating a fitness API integration hard?: It's usually a real re-integration, not a config change. Different providers expose different data shapes, auth models, and access rules, so a migration typically means re-mapping fields, standing up a new OAuth flow (or on-device permission), handling historical data, and asking users to reconnect. The playbooks here break each move into steps and flag where the effort actually lands.
How do I migrate without losing user data or connections?: Plan for continuity: keep the old integration reading while you stand up the new one, back-fill historical data where the new source allows it, and run a re-consent flow so users authorize the new connection before you cut over. Where possible, migrate users in waves and keep a rollback path. The 'keep users connected' playbook covers the sequencing.
Should I move to an aggregator or integrate directly?: An aggregator (Terra, Junction, Rook, Spike) gives you one integration across many devices, which cuts per-vendor work — at a recurring cost and some loss of control. Direct integrations mean more maintenance but no middleman and full access to each provider's data. The direct-to-aggregator and aggregator-to-direct playbooks walk both directions so you can decide by trade-off.

Independent comparison, last reviewed July 20, 2026. Pricing, rate limits, and feature availability change often — confirm current details in each provider’s official documentation before you commit. Product and company names are trademarks of their respective owners; AIFitnessAPI is not affiliated with, endorsed by, or sponsored by any product listed here.