# Sonic AI vs Delta Chat

The clearest difference is in-app purchases: Delta Chat at none against Sonic AI's 1. Delta Chat also leads on review sentiment (63% vs 50%) and ratings volume (129 vs 22). Sonic AI's advantage is update cadence (every 10 days vs every 3 weeks) and iOS requirement (12.0 vs 15.6). On price, rating, ads and device support there is nothing between them.

Both are free to download. Sonic AI sells 1 in-app purchase, starting at $139.99 per year. Delta Chat asks for nothing beyond the download.

Delta Chat holds the better App Store score, 4.4 against 4.3. That said, the two scores are not equally well evidenced: Delta Chat has 129 ratings behind it against 22, so its average is the more settled of the two. Written reviews point the same way: 50% of Sonic AI's written reviews are positive against 63% of Delta Chat's.

Sonic AI ships an update every 10 days, Delta Chat every 3 weeks. The most recent releases landed on November 2, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | Sonic AI | Delta Chat |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.3 (22 ratings)](https://appshunter.io/ios/app/sonic-ai-audio-messenger/id1245484580/reviews) | **[4.4 (129 ratings)](https://appshunter.io/ios/app/delta-chat/id1459523234/reviews)** |
| Number of ratings | 22 | **129** |
| Positive reviews | 50.0% of reviews | **63.2% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 10 days** | Every 3 weeks |
| Monetization | Freemium | **Free** |
| Size | 120 MB | 60 MB |
| Requires iOS | **12.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Hadar Weitzman Group Inc.](https://appshunter.io/developer/335541424) | [merlinux](https://appshunter.io/developer/1459523233) |

## What reviewers say

### Sonic AI

[App page](https://appshunter.io/ios/app/sonic-ai-audio-messenger/id1245484580)

This app offers an audio-first messaging experience with features like adjustable playback speeds, automatic transcription, and AI chatbot integration. It prioritizes secure communication and allows seamless group chats and email messaging.

**Highlights:** Adjustable audio playback speed, Automatic transcription of audio messages, Searchable audio message history, AI chatbot integration, Secure messaging mode, Group chat via phone number or email, Email messaging integration

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium AI | $139.99 | per year |


### Delta Chat

[App page](https://appshunter.io/ios/app/delta-chat/id1459523234)

A decentralized instant messenger prioritizing privacy and ease of use. It allows secure communication with friends, family, and groups without requiring personal data like phone numbers. The app is flexible, reliable in challenging network conditions, and built on open-source principles.

**Highlights:** Private instant onboarding, No phone number required, Mutual consent for messaging, Multiple chat profiles, Works in bad network conditions, End-to-end encryption, Run with own email/server

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Sonic AI free?

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

### Is Delta Chat free?

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

### Which has better reviews, Sonic AI or Delta Chat?

Delta Chat is rated higher. Sonic AI averages 4.3 out of 5 from 22 ratings, while Delta Chat averages 4.4 from 129 ratings.

### Do Sonic AI or Delta Chat have ads?

Neither Sonic AI nor Delta Chat shows ads.

### Which is updated more often, Sonic AI or Delta Chat?

Sonic AI ships an update every 10 days, and Delta Chat every 3 weeks. Most recently, Sonic AI was updated on November 2, 2026 and Delta Chat on November 3, 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.*