# Talk Tools vs Sigma

The clearest difference is price: Sigma at Free against Talk Tools's $74.99. Sigma also leads on update cadence (every 2 days vs fortnightly). Talk Tools's advantage is device support (3 vs 1) and iOS requirement (12.0 vs 18.0). On ads and in-app purchases there is nothing between them.

Sigma is free to download; Talk Tools costs $74.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Talk Tools ships an update fortnightly, Sigma every 2 days. The most recent releases landed on October 9, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | Talk Tools | Sigma |
| --- | --- | --- |
| Price | $74.99 | **Free** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Fortnightly | **Every 2 days** |
| Size | 19 MB | 7 MB |
| Requires iOS | **12.0** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Martin Eisele](https://appshunter.io/developer/1099492467) | [MAJOR Productions LLC](https://appshunter.io/developer/1885618341) |

## What reviewers say

### Talk Tools

[App page](https://appshunter.io/ios/app/talk-tools/id1507392660)

**Features:** Vision Pro support

**In-app purchases:** none


### Sigma

[App page](https://appshunter.io/ios/app/sigma-calculator/id6760669373)

**In-app purchases:** none


## Frequently asked questions

### Is Talk Tools free?

Talk Tools costs $74.99, with no in-app purchases.

### Is Sigma free?

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

### Do Talk Tools or Sigma have ads?

Neither Talk Tools nor Sigma shows ads.

### Which is updated more often, Talk Tools or Sigma?

Talk Tools ships an update fortnightly, and Sigma every 2 days. Most recently, Talk Tools was updated on October 9, 2026 and Sigma on October 6, 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.*