# Master One vs One Line

The clearest difference is ads: One Line at none against Master One's shown. One Line also leads on update cadence (daily vs every 2 months). Master One's advantage is iOS requirement (16.6 vs 18.0). On price, in-app purchases and device support there is nothing between them.

Both are free to download. Master One sells 1 one-off in-app purchase and One Line sells 2 in-app purchases, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.

Master One ships an update every 2 months, One Line daily. The most recent releases landed on November 4, 2026 and November 10, 2026 respectively.

## The numbers

| Metric | Master One | One Line |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/master-one-habit-builder/id6504889928/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 2 months | **Daily** |
| Monetization | Free with in-app purchases | — |
| Size | 3 MB | 37 MB |
| Requires iOS | **16.6** | 18.0 |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [Mary Ogawa](https://appshunter.io/developer/1615657857) | [XTI Co.,Ltd.](https://appshunter.io/developer/1533410506) |

## What reviewers say

### Master One

[App page](https://appshunter.io/ios/app/master-one-habit-builder/id6504889928)

This app guides you in building habits by focusing on one at a time. You can set custom durations, track your progress and streaks, and review your completed habits. It offers a clean, distraction-free interface with options to archive or restart habits.

**Highlights:** One habit focus, Custom habit durations, Streak and history tracking, Mastered habits archive, Minimalist design, Archive and restart habits, Strict mode for perfect streaks

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| LIFE_PURCHASE | $0.99 | one-time |


### One Line

[App page](https://appshunter.io/ios/app/one-line-notes-that-sort/id6806730576)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| One Line Pro (Monthly) | $1.99 | per month |
| One Line Pro | $17.99 | per year |


## Frequently asked questions

### Is Master One free?

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

### Is One Line free?

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

### Do Master One or One Line have ads?

Master One shows ads; One Line does not.

### Which is updated more often, Master One or One Line?

Master One ships an update every 2 months, and One Line daily. Most recently, Master One was updated on November 4, 2026 and One Line on November 10, 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.*