# Sustain Program vs One Question Journal

The clearest difference is update cadence: One Question Journal at weekly against Sustain Program's monthly. One Question Journal also leads on device support (4 vs 2). Sustain Program's advantage is iOS requirement (15.0 vs 26.2). On price, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Sustain Program ships an update monthly, One Question Journal weekly. The most recent releases landed on October 2, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | Sustain Program | One Question Journal |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[2.0 (4 ratings)](https://appshunter.io/ios/app/sustain-program/id1535036436/reviews)** | — |
| Number of ratings | **4** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Monthly | **Weekly** |
| Monetization | Free | — |
| Size | 56 MB | 13 MB |
| Requires iOS | **15.0** | 26.2 |
| Devices | iPhone, iPod | **iPhone, iPad, Apple Watch, Vision Pro** |
| Age rating | 4+ | 4+ |
| Developer | [Health Enhancement Systems](https://appshunter.io/developer/453599280) | [Waseef Akhtar](https://appshunter.io/developer/1877652451) |

## What reviewers say

### Sustain Program

[App page](https://appshunter.io/ios/app/sustain-program/id1535036436)

Learn to make everyday choices that benefit your health and the environment. This program helps you reduce your ecological footprint, conserve resources, and combat climate change while improving personal well-being and saving money. Personalize your experience to focus on areas like nature connection, waste reduction, advocacy, or sustainable eating.

**Highlights:** Reduce ecological footprint, Conserve natural resources, Lessen climate change impact, Enhance personal well-being, Save money, Personalized experience, Daily tips and recipes

**Features:** Vision Pro support

**In-app purchases:** none


### One Question Journal

[App page](https://appshunter.io/ios/app/one-question-journal/id6759250351)

**Features:** macOS Compatibility, Apple Watch app

**In-app purchases:** none


## Frequently asked questions

### Is Sustain Program free?

Sustain Program is free to download, with no in-app purchases.

### Is One Question Journal free?

One Question Journal is free to download, with no in-app purchases.

### Do Sustain Program or One Question Journal have ads?

Neither Sustain Program nor One Question Journal shows ads.

### Which is updated more often, Sustain Program or One Question Journal?

Sustain Program ships an update monthly, and One Question Journal weekly. Most recently, Sustain Program was updated on October 2, 2026 and One Question Journal on October 9, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*