# Master One vs Lefty Keyboard

The clearest difference is rating: Master One at 5.0 against Lefty Keyboard's 3.0. Lefty Keyboard's advantage is update cadence (every 9 days vs every 2 months). On price, ratings volume, ads and in-app purchases there is nothing between them.

Both are free to download. Master One sells 1 one-off in-app purchase and Lefty Keyboard sells 6 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

Master One holds the better App Store score, 5.0 against 3.0. Both are backed by a comparable volume of ratings — 1 and 2 respectively.

Master One ships an update every 2 months, Lefty Keyboard every 9 days. The most recent releases landed on October 10, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | Master One | Lefty Keyboard |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/master-one-habit-builder/id6504889928/reviews)** | [3.0 (2 ratings)](https://appshunter.io/ios/app/lefty-keyboard/id6747690601/reviews) |
| Number of ratings | 1 | **2** |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 2 months | **Every 9 days** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 3 MB | 10 MB |
| Requires iOS | **16.6** | 17.0 |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 12+ |
| Developer | [Mary Ogawa](https://appshunter.io/developer/1615657857) | [EMiR EMRAH UCKAN](https://appshunter.io/developer/1780892760) |

## 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 |


### Lefty Keyboard

[App page](https://appshunter.io/ios/app/lefty-keyboard/id6747690601)

A universal keyboard layout designed specifically for left-handed iPhone and iPad users. It prioritizes privacy with no tracking or full access, and is optimized for performance and battery life.

**Highlights:** Left-handed layout, Universal for iPhone/iPad, No full access required, No tracking, No ads, Lightweight and battery-friendly

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Lefty Pro Monthly | $2.99 | per month |
| Destekçi - Aylık | $4.99 | per month |
| Lefty Pro | $29.99 | per year |
| Küçük Bahşiş | $0.99 | one-time |
| Orta Bahşiş | $2.99 | one-time |
| Büyük Bahşiş | $4.99 | one-time |


## Frequently asked questions

### Is Master One free?

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

### Is Lefty Keyboard free?

Lefty Keyboard is free to download, with in-app purchases available.

### Which has better reviews, Master One or Lefty Keyboard?

Master One is rated higher. Master One averages 5.0 out of 5 from 1 ratings, while Lefty Keyboard averages 3.0 from 2 ratings.

### Do Master One or Lefty Keyboard have ads?

Both Master One and Lefty Keyboard show ads.

### Which is updated more often, Master One or Lefty Keyboard?

Master One ships an update every 2 months, and Lefty Keyboard every 9 days. Most recently, Master One was updated on October 10, 2026 and Lefty Keyboard on October 6, 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.*