# Unit Convert Master vs Plimsoll

The clearest difference is in-app purchases: Unit Convert Master at none against Plimsoll's 3. Unit Convert Master also leads on iOS requirement (18.2 vs 26.0). Plimsoll's advantage is ads (none vs shown) and update cadence (every 6 days vs every 4 months). On price, rating, ratings volume and device support there is nothing between them.

Both are free to download. Plimsoll sells 3 one-off in-app purchases. Unit Convert Master asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 5.0 for Unit Convert Master against 5.0 for Plimsoll. Both are backed by a comparable volume of ratings — 2 and 4 respectively.

Unit Convert Master ships an update every 4 months, Plimsoll every 6 days. Both last shipped on October 30, 2026.

## The numbers

| Metric | Unit Convert Master | Plimsoll |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (2 ratings)](https://appshunter.io/ios/app/unit-convert-master/id6743671551/reviews) | [5.0 (4 ratings)](https://appshunter.io/ios/app/plimsoll-burnout-and-focus/id6751366557/reviews) |
| Number of ratings | 2 | **4** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 4 months | **Every 6 days** |
| Monetization | **Ad-supported** | Free with in-app purchases |
| Size | 4 MB | 10 MB |
| Requires iOS | **18.2** | 26.0 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Mizuki Hoshida](https://appshunter.io/developer/1797942917) | [Factory 620 LLC](https://appshunter.io/developer/1339981421) |

## What reviewers say

### Unit Convert Master

[App page](https://appshunter.io/ios/app/unit-convert-master/id6743671551)

Easily convert between over 100 measurement units across 15 categories. This app offers a user-friendly interface, offline functionality, and a history of your conversions for quick access. Ideal for students, professionals, and everyday users needing precise calculations.

**Highlights:** 15+ conversion categories, 100+ measurement units, Intuitive interface with themes, Custom keyboard for input, Conversion history with search, Offline functionality

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

**In-app purchases:** none


### Plimsoll

[App page](https://appshunter.io/ios/app/plimsoll-burnout-and-focus/id6751366557)

This visual planner helps you manage tasks by respecting your mental capacity. It uses a unique "Plimsoll Line" to visualize your workload, preventing overwhelm and anxiety. Features include mood tracking, stress recovery tools, and integration with your existing reminders.

**Highlights:** Visual workload indicator, Mood tracking widget, Stress recovery screen, Integrates with Reminders, ADHD-friendly design, No overdue badges

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Buy me a coffee | $1.99 | one-time |
| First Mate | $4.99 | one-time |
| Golden Captain | $19.99 | one-time |


## Frequently asked questions

### Is Unit Convert Master free?

Unit Convert Master is free to download, with no in-app purchases.

### Is Plimsoll free?

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

### Which has better reviews, Unit Convert Master or Plimsoll?

Unit Convert Master and Plimsoll are both rated 5.0 out of 5 on the App Store, from 2 and 4 ratings respectively.

### Do Unit Convert Master or Plimsoll have ads?

Unit Convert Master shows ads; Plimsoll does not.

### Which is updated more often, Unit Convert Master or Plimsoll?

Unit Convert Master ships an update every 4 months, and Plimsoll every 6 days. Most recently, Unit Convert Master was updated on October 30, 2026 and Plimsoll on October 30, 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.*