# BasicATTCalc vs ClawOS

The clearest difference is price: ClawOS at Free against BasicATTCalc's $1.99. ClawOS also leads on update cadence (every 10 days vs every 29 months). BasicATTCalc's advantage is in-app purchases (none vs 5) and device support (3 vs 1). On ads there is nothing between them.

ClawOS is free to download; BasicATTCalc costs $1.99 up front. ClawOS sells 5 in-app purchases, starting at $29.99 per month. BasicATTCalc asks for nothing beyond the download.

BasicATTCalc ships an update every 29 months, ClawOS every 10 days. The most recent releases landed on September 20, 2026 and September 28, 2026 respectively.

## The numbers

| Metric | BasicATTCalc | ClawOS |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| Rating | — | **[3.0 (24 ratings)](https://appshunter.io/ios/app/clawos/id6759203618/reviews)** |
| Number of ratings | — | **24** |
| Positive reviews | — | 50.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 29 months | **Every 10 days** |
| Monetization | — | Freemium |
| Size | 7 MB | 28 MB |
| Requires iOS | **14.5** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 17+ |
| Developer | [TAKAHIKO FUKUYAMA](https://appshunter.io/developer/857468511) | [Spark Limited Liability Company](https://appshunter.io/developer/1581487057) |

## What reviewers say

### BasicATTCalc

[App page](https://appshunter.io/ios/app/basicattcalc/id947238679)

**Features:** macOS Compatibility

**In-app purchases:** none


### ClawOS

[App page](https://appshunter.io/ios/app/clawos/id6759203618)

This app provides a private AI assistant running in your own dedicated cloud container, ensuring your data and conversations remain secure and unshared. It offers a free tier with limited messages and a premium subscription for unlimited access, file storage, and extensive integrations.

**Highlights:** Dedicated private cloud container, 20 free AI messages daily, Personalized daily briefing, Unlimited conversations (subscription), Private workspace with file storage, 100+ integrations, Custom alerts and scheduled tasks

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

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| ClawOS Monthly | $29.99 | per month |
| 80 AI Credits | $9.99 | one-time |
| 200 AI Credits | $24.99 | one-time |
| 400 AI Credits | $49.99 | one-time |
| 1600 AI Credits | $199.99 | one-time |


## Frequently asked questions

### Is BasicATTCalc free?

BasicATTCalc costs $1.99, with no in-app purchases.

### Is ClawOS free?

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

### Do BasicATTCalc or ClawOS have ads?

Neither BasicATTCalc nor ClawOS shows ads.

### Which is updated more often, BasicATTCalc or ClawOS?

BasicATTCalc ships an update every 29 months, and ClawOS every 10 days. Most recently, BasicATTCalc was updated on September 20, 2026 and ClawOS on September 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.*