Sustain: GLP-1 Companion
Protect muscle, not just fat
About
This app helps users manage GLP-1 medications by tracking doses, protein intake, and side effects. It provides AI-powered meal analysis and links health calculations to scientific sources. Data is backed up with account creation, and premium features are available via subscription.
What's New in Sustain
2.2.1
August 17, 2026
This update includes behind-the-scenes improvements to app stability and performance. No visible changes to your experience.
Subscription plans
Sustain+ Monthly
Full history, AI photo estimate, weekly recap
In-App Purchases
$19.99
Maintenance Program
Weight range + prescriber discussion guide
FAQ
What is Sustain?
Sustain is a companion app designed for users of GLP-1 medications. It helps you track your medication doses, monitor protein intake to preserve muscle, log weight and side effects, and provides reminders for your next dose.
How does Sustain help with protein intake?
Sustain allows you to track your daily protein intake with a target calculated for your goals. It also offers an AI-powered feature to estimate protein content from meal photos, helping you ensure you're losing fat, not muscle.
Is Sustain a medical device or does it give medical advice?
Sustain is a tracking tool and does not provide medical advice. All health calculations are linked to their original sources, such as peer-reviewed research and FDA-approved prescribing information. It is not a substitute for guidance from your prescriber.
How does Sustain handle user data?
Sustain requires a free account, created via Sign in with Apple, to back up your medication, dose, weight, protein, and side-effect history. This ensures your data is safe if you switch phones or reinstall the app. You can delete your account and data at any time within the app.
What features are included in the Sustain+ subscription?
The Sustain+ subscription unlocks full history and trends, AI photo protein estimates, side-effect pattern reports, and a weekly AI-generated recap of your progress. This premium tier offers deeper insights into your health journey.
How can I cancel my Sustain+ subscription?
Subscriptions renew automatically unless canceled at least 24 hours before the end of the current period. You can manage or cancel your subscription at any time through your Apple ID account settings.
What devices is Sustain available on?
Sustain is available for iPhone and iPad devices, allowing users to track their health and medication on their preferred Apple devices.
How often is Sustain updated?
The latest version of Sustain is 2.0.1, and it was last updated on August 2, 2026. This indicates recent development and ongoing support for the application.