# thumbs.work vs Sumi

The clearest difference is in-app purchases: thumbs.work at none against Sumi's 2. thumbs.work also leads on iOS requirement (15.1 vs 17.0). On price, ads and device support there is nothing between them.

Both are free to download. Sumi sells 2 one-off in-app purchases. thumbs.work asks for nothing beyond the download.

## The numbers

| Metric | thumbs.work | Sumi |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/thumbswork/id6775853999/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | — | Every 5 days |
| Monetization | Freemium | — |
| Size | 39 MB | 8 MB |
| Requires iOS | **15.1** | 17.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Iona, LLC](https://appshunter.io/developer/6775854001) | [Sigit Kuncoro](https://appshunter.io/developer/1889728747) |

## What reviewers say

### thumbs.work

[App page](https://appshunter.io/ios/app/thumbswork/id6775853999)

This app functions as a smart notepad that instantly calculates results as you type in plain language. It offers extensive scientific calculations, unit conversions, and time zone translations. Manage multiple scratchpads for different purposes and export your data in various formats.

**Highlights:** Calculate as you type, Instant scientific calculations, Extensive unit conversions, Time zone calculations, Running totals and previous results, Separate, searchable scratchpads, Import/export data

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

**In-app purchases:** none


### Sumi

[App page](https://appshunter.io/ios/app/sumi-notepad-calculator/id6816366548)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 7‑Day Pro Trial | Free | one-time |
| Sumi Pro | $7.99 | one-time |


## Frequently asked questions

### Is thumbs.work free?

thumbs.work is free to download, with no in-app purchases.

### Is Sumi free?

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

### Do thumbs.work or Sumi have ads?

Neither thumbs.work nor Sumi shows ads.

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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.*