# Habit 21 vs Waterfall 2

The clearest difference is update cadence: Waterfall 2 at every 3 weeks against Habit 21's every 3 months. On price, ads, in-app purchases and device support there is nothing between them.

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

Habit 21 ships an update every 3 months, Waterfall 2 every 3 weeks. The most recent releases landed on October 13, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | Habit 21 | Waterfall 2 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/habit-21/id1529500794/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 3 weeks** |
| Monetization | Free | — |
| Size | 9 MB | 37 MB |
| Requires iOS | **14.4** | 15.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Michael Nash](https://appshunter.io/developer/1489074053) | [ShenZhen Yuyue Technology Co., Ltd.](https://appshunter.io/developer/1212727401) |

## What reviewers say

### Habit 21

[App page](https://appshunter.io/ios/app/habit-21/id1529500794)

This app guides users through a 21-day program to build new habits or break old ones. It provides daily inspirational videos, science-backed insights, and testimonials to support habit formation. Users receive notifications to perform their chosen habit daily, with progress tracking after the initial 21-day period.

**Highlights:** 21-day habit countdown, Daily inspirational videos, Science-backed insights, Expert testimonials, Progress tracking, Customizable habit reminders

**Features:** macOS Compatibility

**In-app purchases:** none


### Waterfall 2

[App page](https://appshunter.io/ios/app/waterfall-2/id6444697367)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Habit 21 free?

Habit 21 is free to download, with no in-app purchases.

### Is Waterfall 2 free?

Waterfall 2 is free to download, with no in-app purchases.

### Do Habit 21 or Waterfall 2 have ads?

Neither Habit 21 nor Waterfall 2 shows ads.

### Which is updated more often, Habit 21 or Waterfall 2?

Habit 21 ships an update every 3 months, and Waterfall 2 every 3 weeks. Most recently, Habit 21 was updated on October 13, 2026 and Waterfall 2 on October 27, 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.*