# Soniox vs Keystone

The clearest difference is in-app purchases: Keystone at none against Soniox's 2. On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Soniox sells 2 in-app purchases, starting at $19.99 per month. Keystone asks for nothing beyond the download.

Soniox ships an update every 10 days, Keystone fortnightly. The most recent releases landed on October 19, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | Soniox | Keystone |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (169 ratings)](https://appshunter.io/ios/app/soniox-speech-to-text-ai/id1560199731/reviews)** | — |
| Number of ratings | **169** | — |
| Positive reviews | 68.4% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 10 days** | Fortnightly |
| Monetization | Free with in-app purchases | — |
| Size | 64 MB | 4 MB |
| Requires iOS | **16.4** | 17.0 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Soniox Inc](https://appshunter.io/developer/1560199733) | [Ionut Mocanu](https://appshunter.io/developer/1648541447) |

## What reviewers say

### Soniox

[App page](https://appshunter.io/ios/app/soniox-speech-to-text-ai/id1560199731)

This app uses advanced AI to transcribe and translate speech in over 60 languages in real-time. It provides instant summaries, identifies speakers, and offers context-aware accuracy for enhanced understanding. Securely share or export your transcribed conversations and notes.

**Highlights:** Real-time transcription with speaker ID, Speech translation in 60+ languages, AI-generated summaries and key insights, Custom AI prompts for analysis, Context-aware accuracy enhancement, Privacy-first design with on-device processing, Easy sharing and export options

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro | $19.99 | per month |
| Pro | $119.99 | per year |


### Keystone

[App page](https://appshunter.io/ios/app/keystone-project-tracker/id6760302143)

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

**In-app purchases:** none


## Frequently asked questions

### Is Soniox free?

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

### Is Keystone free?

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

### Do Soniox or Keystone have ads?

Neither Soniox nor Keystone shows ads.

### Which is updated more often, Soniox or Keystone?

Soniox ships an update every 10 days, and Keystone fortnightly. Most recently, Soniox was updated on October 19, 2026 and Keystone 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.*