# ONE Habit Tracker vs Chay

The clearest difference is in-app purchases: Chay at none against ONE Habit Tracker's 3. Chay also leads on update cadence (every 11 days vs every 2 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. ONE Habit Tracker sells 3 in-app purchases, starting at $3.99 per month. Chay asks for nothing beyond the download.

ONE Habit Tracker ships an update every 2 months, Chay every 11 days. The most recent releases landed on October 2, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | ONE Habit Tracker | Chay |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/one-habit-tracker-progress/id6748330634/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 11 days** |
| Monetization | Freemium | — |
| Size | 18 MB | 9 MB |
| Requires iOS | 18.0 | 18.0 |
| Devices | iPhone | iPhone |
| Age rating | 4+ | 12+ |
| Developer | [Jeff Cedilla](https://appshunter.io/developer/944615129) | [Vibalyze OU](https://appshunter.io/developer/1812962100) |

## What reviewers say

### ONE Habit Tracker

[App page](https://appshunter.io/ios/app/one-habit-tracker-progress/id6748330634)

This app helps you build lasting habits by focusing on mastering one at a time. It uses psychology-backed commitment periods, intelligent insights, and streak risk prediction to prevent failure and celebrate your wins.

**Highlights:** Master one habit at a time, Commitment-based system (30, 60, 90 days), Streak risk prediction, Mood tracking for trigger identification, Visual streak counters and milestone celebrations, Weekly analytics and progress reports, Distraction-free interface with dark mode

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $3.99 | per month |
| Yearly | $6.99 | per year |
| Lifetime | $9.99 | one-time |


### Chay

[App page](https://appshunter.io/ios/app/chay-habbit-tracker/id6752284032)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is ONE Habit Tracker free?

ONE Habit Tracker is free to download, with in-app purchases available.

### Is Chay free?

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

### Do ONE Habit Tracker or Chay have ads?

Neither ONE Habit Tracker nor Chay shows ads.

### Which is updated more often, ONE Habit Tracker or Chay?

ONE Habit Tracker ships an update every 2 months, and Chay every 11 days. Most recently, ONE Habit Tracker was updated on October 2, 2026 and Chay on October 13, 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.*