Support

Common questions

The app is asking me to confirm a reading. Why?

Because GonioPlus is an educational and reference tool, not a medical device. Every angle it shows is an estimate produced by the phone's motion sensors, and it must be confirmed with a separate, validated method — such as a manual goniometer — together with your own professional judgement before you rely on it for anything.

A measurement looks wrong.

Phone-sensor readings are affected by how the device is held, where it sits on the limb, and how steady the movement is. Rest the phone flat against the segment you are measuring, keep it still while the reading settles, and re-zero at the starting position before each movement. If a joint or movement is consistently out, email us the joint, the movement, and what a manual goniometer gave for the same position.

How do I manage or cancel my subscription?

Subscriptions are sold and managed by Apple, not by GonioPlus, so they are changed or cancelled in your Apple account rather than in the app: open the Settings app, tap your name, then Subscriptions — or go to apps.apple.com/account/subscriptions. Refund requests are also handled by Apple, at reportaproblem.apple.com.

I paid but the app still shows the free version.

Open Settings inside GonioPlus and use Restore Purchases, making sure you are signed in to the same Apple Account that bought the subscription. If it still does not appear, email us and we will help.

Where is my data stored, and can you recover it?

Everything you record — clinician details, client or session names, measurements, and reports — is stored only on your own device. The app has no account and no server, and nothing is transmitted to the developer. That also means there is no backup we can restore from: if the app is deleted, its data goes with it, unless it is in an iPhone backup of your own. The Privacy Policy sets this out in full.

How do I delete my data?

Delete individual measurements, sessions, or reports inside the app, or delete the app itself to remove all of its stored data from the device. Because the developer holds none of it, there is nothing for us to delete on your behalf.

Can I get a report out of the app?

Yes — reports export as text or PDF and can be sent through Mail, Messages, Files, AirDrop, or anywhere else iOS offers. Once a report leaves the app it is yours to handle in line with the data-protection duties that apply to you.

Reporting a security issue

If you believe you have found a security or privacy problem, email gonioplus@protonmail.com with the details and please give us a reasonable chance to fix it before publishing.