# Dark Digits vs ProCalc

The clearest difference is in-app purchases: Dark Digits at none against ProCalc's 4. Dark Digits also leads on ads (none vs shown). ProCalc's advantage is update cadence (monthly vs every 2 months) and device support (3 vs 1). On price there is nothing between them.

Both are free to download. ProCalc sells 4 one-off in-app purchases. Dark Digits asks for nothing beyond the download.

Dark Digits ships an update every 2 months, ProCalc monthly. Both last shipped on October 28, 2026.

## The numbers

| Metric | Dark Digits | ProCalc |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 2 months | **Monthly** |
| Size | 4 MB | 34 MB |
| Requires iOS | 17.6 | **13.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [YMMV](https://appshunter.io/developer/1224453829) | [Penquinzoo Limited](https://appshunter.io/developer/1551454365) |

## What reviewers say

### Dark Digits

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

**Features:** macOS Compatibility

**In-app purchases:** none


### ProCalc

[App page](https://appshunter.io/ios/app/procalc-calculator-app/id6756341509)

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock Flat themes | $3.99 | one-time |
| Graphs and pdf export. | $3.99 | one-time |
| Unlock Neon themes | $4.99 | one-time |
| All  themes | $4.99 | one-time |


## Frequently asked questions

### Is Dark Digits free?

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

### Is ProCalc free?

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

### Do Dark Digits or ProCalc have ads?

ProCalc shows ads; Dark Digits does not.

### Which is updated more often, Dark Digits or ProCalc?

Dark Digits ships an update every 2 months, and ProCalc monthly. Most recently, Dark Digits was updated on October 28, 2026 and ProCalc on October 28, 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.*