# Solvay vs Sayili Express

The clearest difference is update cadence: Sayili Express at every 2 weeks against Solvay's every 7 months. 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.

Solvay ships an update every 7 months, Sayili Express every 2 weeks. The most recent releases landed on October 28, 2026 and October 16, 2026 respectively.

## The numbers

| Metric | Solvay | Sayili Express |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 7 months | **Every 2 weeks** |
| Size | 30 MB | 81 MB |
| Requires iOS | **15.1** | 15.5 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 17+ |
| Developer | [Mehmet Epikman](https://appshunter.io/developer/1796360960) | [SADIK AKTAN](https://appshunter.io/developer/1867988093) |

## What reviewers say

### Solvay

[App page](https://appshunter.io/ios/app/solvay/id6744104452)

**Features:** macOS Compatibility

**In-app purchases:** none


### Sayili Express

[App page](https://appshunter.io/ios/app/sayili-express/id6757631772)

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

**In-app purchases:** none


## Frequently asked questions

### Is Solvay free?

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

### Is Sayili Express free?

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

### Do Solvay or Sayili Express have ads?

Neither Solvay nor Sayili Express shows ads.

### Which is updated more often, Solvay or Sayili Express?

Solvay ships an update every 7 months, and Sayili Express every 2 weeks. Most recently, Solvay was updated on October 28, 2026 and Sayili Express on October 16, 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.*