Support

This page is the Support URL required by App Store Connect.

Contact

Email health.spline.app@gmail.com. Spline is built by one person, so please allow a few working days for a reply. Telling me your iPhone model, iOS version and Spline version helps enormously.

Common questions

Spline shows no data

Spline can only read what Apple Health actually contains, and only what you have granted. Check Settings › Health › Data Access & Devices › Spline and make sure the categories you care about are enabled. iOS silently denies read access without telling the app, so a missing metric is almost always a permission that was never granted.

My readiness score looks wrong

Tap the ⓘ on any metric. Spline shows the formula, the drivers and the paper it comes from — including its baseline window. Most surprising scores are explained by a short baseline: personalised HRV bands need a few weeks of nights before they settle.

How do I get my data out?

More › Health report & backup › export. You get a full JSON backup plus CSV files for labs, strength and body metrics. This is free forever and is not part of any subscription.

How do I restore a backup?

More › Health report & backup › restore, then pick your backup file. Backups written by earlier versions of the app — including those made before it was renamed — still restore correctly.

Managing Spline Pro

Subscriptions are billed by Apple. Manage or cancel in Settings › [your name] › Subscriptions; refunds go through reportaproblem.apple.com. Cancelling never deletes data you already recorded.

Which devices are supported?

iPhone and iPad with iOS 17 or later, plus a companion Apple Watch app. An Apple Watch improves HRV, sleep and workout coverage but is not required; Polar devices can be connected directly. Oura, Garmin, Withings and Amazfit reach Spline through Apple Health, though Garmin does not share HRV that way.

My widgets or my watch show no reading

Widgets and the Apple Watch app display the call your iPhone already computed; they never recompute it. Open Spline on your iPhone once and they update. A reading from an earlier day is always shown with its date rather than passed off as today’s.

Do I need Apple Intelligence?

No. Ask Spline and describing a meal, workout or routine use Apple’s on-device model where Apple Intelligence is available, and built-in rules everywhere else. Either way, the numbers come from your measurements and the food databases, never from the model.

Can I switch the language?

Yes. Spline is fully translated into German. It follows your iPhone’s language by default, or you can pick English or Deutsch in More › App › Language.

Reporting something that looks scientifically wrong

This is the most valuable bug report you can send. Every metric cites a PubMed ID — if you believe a formula or a reference range is misapplied, tell me which metric and which paper, and I will re-check it against the source.