# Underload vs Master One

The clearest difference is price: Master One at Free against Underload's $4.99. Underload's advantage is in-app purchases (none vs 1) and ads (none vs shown). On rating, ratings volume, update cadence and iOS requirement there is nothing between them.

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

On the App Store both sit at effectively the same score — 5.0 for Underload against 5.0 for Master One. Both are backed by a comparable volume of ratings — 1 and 1 respectively.

Underload ships an update monthly, Master One every 2 months. The most recent releases landed on September 26, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | Underload | Master One |
| --- | --- | --- |
| Price | $4.99 | **Free** |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/underload/id6475277279/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/master-one-habit-builder/id6504889928/reviews) |
| Number of ratings | 1 | 1 |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | **Monthly** | Every 2 months |
| Monetization | Paid | **Free with in-app purchases** |
| Size | 2 MB | 3 MB |
| Requires iOS | 17.0 | **16.6** |
| Devices | **iPhone, iPad, Mac** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Anuradha Vellineni](https://appshunter.io/developer/1539259961) | [Mary Ogawa](https://appshunter.io/developer/1615657857) |

## What reviewers say

### Underload

[App page](https://appshunter.io/ios/app/underload/id6475277279)

This productivity app helps you focus by displaying only one task at a time from your to-do list. It syncs seamlessly with Apple Reminders, allowing you to manage tasks across all your devices and use familiar voice commands and shortcuts.

**Highlights:** Single task display, Syncs with Apple Reminders, Cross-device synchronization, Supports Siri and Shortcuts, Linear task progression

**Features:** Vision Pro support

**In-app purchases:** none


### 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 |


## Frequently asked questions

### Is Underload free?

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

### Is Master One free?

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

### Which has better reviews, Underload or Master One?

Underload and Master One are both rated 5.0 out of 5 on the App Store, from 1 and 1 ratings respectively.

### Do Underload or Master One have ads?

Master One shows ads; Underload does not.

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

Underload ships an update monthly, and Master One every 2 months. Most recently, Underload was updated on September 26, 2026 and Master One on October 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.*