# Units vs Subscriptionstrack

The clearest difference is ads: Subscriptionstrack at none against Units's shown. Subscriptionstrack also leads on update cadence (daily vs monthly). Units's advantage is iOS requirement (17.0 vs 26.0). On price, in-app purchases and device support there is nothing between them.

Both are free to download. Units sells 3 one-off in-app purchases and Subscriptionstrack sells 1 in-app purchase, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.

Units ships an update monthly, Subscriptionstrack daily. Both last shipped on October 24, 2026.

## The numbers

| Metric | Units | Subscriptionstrack |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.1 (49 ratings)](https://appshunter.io/ios/app/units-pro-unit-converter/id284574017/reviews)** | — |
| Number of ratings | **49** | — |
| Positive reviews | 60.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Monthly | **Daily** |
| Monetization | Free with in-app purchases | — |
| Size | 86 MB | 17 MB |
| Requires iOS | **17.0** | 26.0 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Homegrown Software Ltd](https://appshunter.io/developer/406645730) | [MENG JU WU](https://appshunter.io/developer/1543346509) |

## What reviewers say

### Units

[App page](https://appshunter.io/ios/app/units-pro-unit-converter/id284574017)

Easily convert between hundreds of units across 43 categories, including currency with daily updated rates. Customize your workflow by hiding or reordering units and categories.

**Highlights:** Hundreds of units across 43 categories, Daily updated currency exchange rates, Hide unused units, Reorder units and categories, Universal app support (iPhone, iPod touch, iPad)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Small Tip | $0.99 | one-time |
| Medium Tip | $2.99 | one-time |
| Large Tip | $4.99 | one-time |

**What reviewers like**

- 🚀 Efficient and fast conversions
- 👍 Comprehensive list of units
- 🔍 Customizable unit selection
- 💰 Free app with optional paid version
- 🔧 Useful for engineering and technical work

**What reviewers complain about**

- 🐛 Crashes and stability issues
- 🕰️ Outdated currency conversion rates
- 🔍 Too many unit categories, hard to navigate
- 💰 Ads in free version
- 📏 Ruler feature not accurate on some devices

**Reported bugs**

- Crashes when clearing input fields
- Numerical keypad covers conversion results
- Incompatibility issues with newer iOS versions
- Ruler measurements not accurate on all devices

**Requested features**

- Add nautical units (miles, knots)
- Improve currency conversion accuracy and updates
- Allow customization of visible unit categories
- Add more clothing/shoe size conversions
- Improve user interface and search functionality


### Subscriptionstrack

[App page](https://appshunter.io/ios/app/subscriptionstrack/id6762182259)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Monthly | $1.99 | per month |


## Frequently asked questions

### Is Units free?

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

### Is Subscriptionstrack free?

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

### Do Units or Subscriptionstrack have ads?

Units shows ads; Subscriptionstrack does not.

### Which is updated more often, Units or Subscriptionstrack?

Units ships an update monthly, and Subscriptionstrack daily. Most recently, Units was updated on October 24, 2026 and Subscriptionstrack on October 24, 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.*