# One Habit vs Sync

The clearest difference is price: One Habit at Free against Sync's $4.99. One Habit also leads on iOS requirement (15.0 vs 18.0). Sync's advantage is in-app purchases (none vs 1) and update cadence (weekly vs monthly). On ads and device support there is nothing between them.

One Habit is free to download; Sync costs $4.99 up front. One Habit sells 1 one-off in-app purchase. Sync asks for nothing beyond the download.

One Habit ships an update monthly, Sync weekly. The most recent releases landed on October 25, 2026 and October 29, 2026 respectively.

## The numbers

| Metric | One Habit | Sync |
| --- | --- | --- |
| Price | **Free** | $4.99 |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Monthly | **Weekly** |
| Monetization | — | Paid |
| Size | 51 MB | 12 MB |
| Requires iOS | **15.0** | 18.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Sandra Zanglein](https://appshunter.io/developer/1895452172) | [037](https://appshunter.io/developer/1880940306) |

## What reviewers say

### One Habit

[App page](https://appshunter.io/ios/app/one-habit-remember-why/id6763713166)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| One Habit Lifetime | $9.99 | one-time |


### Sync

[App page](https://appshunter.io/ios/app/sync-plan-and-actual/id6808510515)

This app helps you compare your planned schedule with your actual daily activities. It visualizes where your time goes, highlighting discrepancies and helping you identify time-wasting habits. Integrate with Apple Health and Calendar for automatic tracking.

**Highlights:** Dual timeline for plan vs. actual, One-tap confirmation of planned activities, Habit and repeat plan creation, Real-time timer tracking, Goal setting and to-do lists, Apple Health and Calendar integration, iCloud sync across devices

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is One Habit free?

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

### Is Sync free?

Sync costs $4.99, with no in-app purchases.

### Do One Habit or Sync have ads?

Neither One Habit nor Sync shows ads.

### Which is updated more often, One Habit or Sync?

One Habit ships an update monthly, and Sync weekly. Most recently, One Habit was updated on October 25, 2026 and Sync on October 29, 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.*