# Calculator T vs Dark Digits

The clearest difference is update cadence: Calculator T at every 2 days against Dark Digits's every 2 months. Calculator T also leads on device support (3 vs 1) and iOS requirement (11.0 vs 17.6). On price, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Calculator T ships an update every 2 days, Dark Digits every 2 months. The most recent releases landed on October 19, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | Calculator T | Dark Digits |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 days** | Every 2 months |
| Monetization | Free | — |
| Size | 16 MB | 4 MB |
| Requires iOS | **11.0** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Xiao Hou Yi Sheng Traditional Chinese Medicine Technology (Shenzhen) Co., Ltd](https://appshunter.io/developer/1524258136) | [YMMV](https://appshunter.io/developer/1224453829) |

## 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


### Dark Digits

[App page](https://appshunter.io/ios/app/dark-digits/id6744330793)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Calculator T free?

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

### Is Dark Digits free?

Dark Digits is free to download, with no in-app purchases.

### Do Calculator T or Dark Digits have ads?

Neither Calculator T nor Dark Digits shows ads.

### Which is updated more often, Calculator T or Dark Digits?

Calculator T ships an update every 2 days, and Dark Digits every 2 months. Most recently, Calculator T was updated on October 19, 2026 and Dark Digits on October 14, 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.*