# EVOLVEO Sonix vs KCSDI

The clearest difference is update cadence: KCSDI at every 3 weeks against EVOLVEO Sonix's every 4 months. EVOLVEO Sonix's advantage is iOS requirement (9.0 vs 15.5). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

EVOLVEO Sonix ships an update every 4 months, KCSDI every 3 weeks. The most recent releases landed on October 7, 2026 and September 27, 2026 respectively.

## The numbers

| Metric | EVOLVEO Sonix | KCSDI |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 3 weeks** |
| Size | 1 MB | 31 MB |
| Requires iOS | **9.0** | 15.5 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 17+ |
| Developer | [Abacus Electric, s.r.o.](https://appshunter.io/developer/1456109573) | [Chengdu KeChuang Institute of Science and Culture](https://appshunter.io/developer/1690764978) |

## What reviewers say

### EVOLVEO Sonix

[App page](https://appshunter.io/ios/app/evolveo-sonix/id509909805)

**Features:** macOS Compatibility

**In-app purchases:** none


### KCSDI

[App page](https://appshunter.io/ios/app/kcsdi/id6667098118)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is EVOLVEO Sonix free?

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

### Is KCSDI free?

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

### Do EVOLVEO Sonix or KCSDI have ads?

Neither EVOLVEO Sonix nor KCSDI shows ads.

### Which is updated more often, EVOLVEO Sonix or KCSDI?

EVOLVEO Sonix ships an update every 4 months, and KCSDI every 3 weeks. Most recently, EVOLVEO Sonix was updated on October 7, 2026 and KCSDI on September 27, 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.*