Talk Tools vs Sigma
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Talk Tools
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Talk Tools is an app, which allows you a communication with your iOS device by voice. You can use it in many different ways: Conversation: You can setup a predefined conversation with your iPhone. This can be used by performers or to generate a fun conversation. It also can be used by e.g. actors to work on their script. Q&A Use it as a Dictionary/Database to retrieve information by the spoken word. Either to access some previous stored information or play 'spontaneous' answers. Great functionality and flexibility since dynamic contents can be added very easily. E.g. * Information from the spoken word can be stored * Text can be entered and stored etc.
Sigma
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Multi Featured calculator app - with an entertaining bonus feature to mess with your friends! Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | Talk Tools | Sigma |
|---|---|---|
| Price | $74.99 | Free — better |
| Update frequency | Fortnightly | Every 2 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 12.0 — better | 18.0 |
| Further details — not scored | ||
| Size | 19 MB | 7 MB |
| Age rating | 4+ | 4+ |
| Developer | Martin Eisele | MAJOR Productions LLC |
In-app purchases
Talk Tools
No in-app purchases
Sigma
No in-app purchases
