# Thumb calculator vs DataPocket

The clearest difference is in-app purchases: Thumb calculator at none against DataPocket's 2. DataPocket's advantage is ads (none vs shown). On price, update cadence, device support and iOS requirement there is nothing between them.

Both are free to download. DataPocket sells 2 in-app purchases, starting at $4.99 per month. Thumb calculator asks for nothing beyond the download.

Thumb calculator ships an update every 2 weeks, DataPocket weekly. The most recent releases landed on October 4, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | Thumb calculator | DataPocket |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 2 weeks | **Weekly** |
| Size | 35 MB | 24 MB |
| Requires iOS | **15.8.3** | 16.4 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [Hideaki Uchikoshi](https://appshunter.io/developer/1559575002) | [KENJIRO OBORA](https://appshunter.io/developer/1025407585) |

## What reviewers say

### Thumb calculator

[App page](https://appshunter.io/ios/app/thumb-calculator/id6499389948)

**Features:** macOS Compatibility

**In-app purchases:** none


### DataPocket

[App page](https://appshunter.io/ios/app/datapocket/id6618158585)

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Subscription | $4.99 | per month |
| WebLink 5 Tickets | $4.99 | one-time |


## Frequently asked questions

### Is Thumb calculator free?

Thumb calculator is free to download, with no in-app purchases.

### Is DataPocket free?

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

### Do Thumb calculator or DataPocket have ads?

Thumb calculator shows ads; DataPocket does not.

### Which is updated more often, Thumb calculator or DataPocket?

Thumb calculator ships an update every 2 weeks, and DataPocket weekly. Most recently, Thumb calculator was updated on October 4, 2026 and DataPocket on October 7, 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.*