# Calculator T vs Unit Eater

The clearest difference is in-app purchases: Calculator T at none against Unit Eater's 2. Calculator T also leads on update cadence (every 2 days vs every 2 weeks). On price, review sentiment, ads and device support there is nothing between them.

Both are free to download. Unit Eater sells 2 in-app purchases, starting at $0.99 per month. Calculator T asks for nothing beyond the download.

Calculator T ships an update every 2 days, Unit Eater every 2 weeks. The most recent releases landed on October 19, 2026 and October 16, 2026 respectively.

## The numbers

| Metric | Calculator T | Unit Eater |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 2 days** | Every 2 weeks |
| Monetization | **Free** | Free with in-app purchases |
| Size | 16 MB | 65 MB |
| Requires iOS | **11.0** | 12.0 |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, iPod, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Xiao Hou Yi Sheng Traditional Chinese Medicine Technology (Shenzhen) Co., Ltd](https://appshunter.io/developer/1524258136) | [Tom Leon Schmidt](https://appshunter.io/developer/1634212175) |

## What reviewers say

### Calculator T

[App page](https://appshunter.io/ios/app/calculator-t/id6473983653)

This app offers advanced scientific calculation and unit conversion capabilities. It features a history tape, memory functions, and supports complex mathematical operations. It also includes currency exchange rates and a wide range of measurement conversions.

**Highlights:** Standard and scientific function modes, Extensive unit conversion (over 300 units), History tape for last 100 records, Memory buttons (MS, M+, M-, MR, MC), Copy/paste functionality for equations and results, Support for large number calculations and scientific notation, Currency exchange rate conversion

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

**In-app purchases:** none


### Unit Eater

[App page](https://appshunter.io/ios/app/unit-eater/id6742549723)

This utility app functions as a powerful calculator that handles unit conversions and calculations. It supports a vast array of predefined units and allows users to define their own, making it ideal for scientific and academic tasks. Features include a calculation history, customizable results, and dark mode.

**Highlights:** Unit conversion and calculation, Custom unit definition, Extensive unit library, Calculation history, Customizable result format, Dark mode

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium - Monthly | $0.99 | per month |
| Premium - Pay once | $3.99 | one-time |


## Frequently asked questions

### Is Calculator T free?

Calculator T is free to download, with no in-app purchases.

### Is Unit Eater free?

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

### Do Calculator T or Unit Eater have ads?

Neither Calculator T nor Unit Eater shows ads.

### Which is updated more often, Calculator T or Unit Eater?

Calculator T ships an update every 2 days, and Unit Eater every 2 weeks. Most recently, Calculator T was updated on October 19, 2026 and Unit Eater on October 16, 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.*