# Sustain: GLP-1 Companion — Protect muscle, not just fat

> GLP-1 medication companion for tracking doses, protein, and side effects. (iPhone/iPad app by Dhanvanth Sundar Sankar.)

- Source: https://appshunter.io/ios/app/sustain-glp-1-companion/id6793802192 (this page in markdown: same URL + `.md`)
- Developer: [Dhanvanth Sundar Sankar](https://appshunter.io/developer/6793802194)
- Category: Health & Fitness
- Price: Free with in-app purchases
- Rating: 5.00/5 from 2 App Store ratings
- Age rating: 17+
- Requires: iOS 17.0 · 13 MB
- Languages: American English, European Spanish
- Released: 2026-07-29
- Data updated: 2026-08-22
- Monetization: freemium
- User reviews in markdown: https://appshunter.io/ios/app/sustain-glp-1-companion/id6793802192/reviews.md

## What is Sustain?

Sustain is the GLP-1 companion built to protect your muscle, not just track your weight.

TRACK WHAT ACTUALLY MATTERS
- Log doses and injections or pills, on your own schedule, including specific days of the week for non-standard treatment plans, and log a dose in one tap right from your Apple Watch
- Track daily protein so you lose fat, not muscle, with a target calculated for your goals
- Snap a photo of your meal for an instant AI-generated protein estimate
- Photograph a lab report and Sustain transcribes the values so you can watch key biomarkers trend over time
- Save progress photos and compare any two side by side, with your weight and dose context filled in automatically
- Log weight and side effects, and see trends over time
- Get reminded before your next dose, and review your titration plan when your prescriber changes your dose

BUILT ON REAL SOURCES
Every health calculation in Sustain links directly to the sources behind it: peer-reviewed research and each medication's own FDA-approved prescribing information. Sustain is a tracking tool, not medical advice, and never replaces your prescriber's guidance. Lab values are transcribed only, never interpreted or flagged.

YOUR DATA, BACKED UP
Sustain requires a free account (Sign in with Apple or Continue with Google) so your medication, dose, weight, protein, and side-effect history is backed up and available if you switch phones or reinstall. You can delete your account and all its data at any time, right in the app.

SUSTAIN+
Unlock full history and trends, AI photo protein estimates, lab result tracking, progress photos, side-effect pattern reports, and a weekly AI-generated recap of your progress with a Sustain+ subscription. Subscriptions renew automatically unless canceled at least 24 hours before the end of the current period; manage or cancel anytime in your Apple ID account settings.

Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Privacy Policy: https://hearthlyapps.com/privacy/

## Key features

- Log GLP-1 doses and injections/pills
- Track daily protein intake with AI estimates
- Monitor weight and side effects
- Receive dose reminders
- Review titration plans
- Access research-backed health calculations

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| Sustain+ Monthly | $7.99 | per month |
| Sustain+ Annual | $59.99 | per year |

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Maintenance Program | $19.99 | one-time |



## Frequently asked questions about Sustain

### 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.

## Version history (last 5 releases)

### 2.2.1 — 2026-08-17

This update includes behind-the-scenes improvements to app stability and performance. No visible changes to your experience.

### 2.2 — 2026-08-13

Meet Pip, a small companion on your Dashboard who's genuinely glad to see you, however
consistent (or not) your week has been. Tap Pip any time to ask a question about your own
dose, protein, or side-effect data.

New in this update:
- Maintenance mode: once you've reached your goal, switch to a lighter weekly check-in
  and a recap focused on staying steady, not chasing more loss.
- Invite a friend: share your code from Settings and you both get a free month of
  Sustain+.
- Shareable milestone cards: turn a streak or goal into a clean, branded image.
- A clearer overdue-dose alert on your Lock Screen and Dynamic Island.
- AI photo body-fat estimate, sleep and resting-heart-rate trends, and a one-tap
  visit-ready PDF for your prescriber.

As always: free to start, your data stays yours, and nothing in Sustain ever tells you
what dose to take.

### 2.1.1 — 2026-08-09

This update fixes a bug where the Apple Watch app could get stuck showing "Open Sustain on your iPhone first," even after signing in and subscribing on your iPhone. Dose logging and status now sync properly between your iPhone and Apple Watch. Also fixed: a watch-face countdown that could occasionally display incorrectly.

### 2.1 — 2026-08-06

Sustain 2.1 brings three new ways to track your progress:

Apple Watch app - Glance at your next dose and today's protein progress right from your wrist, and log a dose with a single tap without reaching for your phone.

Lab result tracking - Photograph your bloodwork and Sustain transcribes the values so you can watch key biomarkers trend over time alongside your weight and dose history.

Progress photos - Save photos as you go and compare any two side by side, with your weight and dose context filled in automatically.

Also in this update: refinements to specific-days-of-week dose scheduling, a redesigned lab results and biomarker trends view, and general bug fixes and performance improvements.

### 2.0.1 — 2026-08-02

Continue with Google is now available as a second way to sign in, alongside Sign in with
Apple. If you use both, Settings > Account & Sync > Sign-in methods lets you link them to
one account, so either one gets you back to the same data.

Also in this update: your Sustain+ status now follows your account across devices, deleting
your account clearly explains what happens to an active subscription, and you can manage
your subscription without leaving the app.

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-22.*