# Sustain Program vs One Small Step App

The clearest difference is rating: One Small Step App at 5.0 against Sustain Program's 2.0. Sustain Program's advantage is monetization model (free vs ad-supported). On price, ratings volume, update cadence and ads there is nothing between them.

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

One Small Step App holds the better App Store score, 5.0 against 2.0. Both are backed by a comparable volume of ratings — 4 and 3 respectively.

Sustain Program ships an update monthly, One Small Step App every 3 weeks. The most recent releases landed on October 2, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | Sustain Program | One Small Step App |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.0 (4 ratings)](https://appshunter.io/ios/app/sustain-program/id1535036436/reviews) | **[5.0 (3 ratings)](https://appshunter.io/ios/app/one-small-step-app/id6745411081/reviews)** |
| Number of ratings | **4** | 3 |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Monthly | **Every 3 weeks** |
| Monetization | **Free** | Ad-supported |
| Size | 56 MB | 114 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Health Enhancement Systems](https://appshunter.io/developer/453599280) | [One Small Step](https://appshunter.io/developer/1811002565) |

## 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 Small Step App

[App page](https://appshunter.io/ios/app/one-small-step-app/id6745411081)

Connect with certified peer support specialists for addiction and mental health challenges. Access confidential, judgment-free conversations via chat, call, or video, available evenings and weekends. Support is completely free and accessible when you need it most.

**Highlights:** Certified peer support specialists, Confidential and private conversations, Support via chat, call, or video, Available evenings and weekends, Free to use, no insurance needed, Mental health and addiction support

**In-app purchases:** none


## Frequently asked questions

### Is Sustain Program free?

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

### Is One Small Step App free?

One Small Step App is free to download, with no in-app purchases.

### Which has better reviews, Sustain Program or One Small Step App?

One Small Step App is rated higher. Sustain Program averages 2.0 out of 5 from 4 ratings, while One Small Step App averages 5.0 from 3 ratings.

### Do Sustain Program or One Small Step App have ads?

Neither Sustain Program nor One Small Step App shows ads.

### Which is updated more often, Sustain Program or One Small Step App?

Sustain Program ships an update monthly, and One Small Step App every 3 weeks. Most recently, Sustain Program was updated on October 2, 2026 and One Small Step App on October 1, 2026.

---

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