# Si vs Deeck

The clearest difference is in-app purchases: Si at none against Deeck's 1. Si also leads on iOS requirement (9.1 vs 15.0). Deeck's advantage is update cadence (every 4 days vs every 5 months). On price, ads and device support there is nothing between them.

Both are free to download. Deeck sells 1 in-app purchase, starting at $34.99 per year. Si asks for nothing beyond the download.

Si ships an update every 5 months, Deeck every 4 days. The most recent releases landed on November 11, 2026 and November 13, 2026 respectively.

## The numbers

| Metric | Si | Deeck |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 5 months | **Every 4 days** |
| Size | 12 MB | 44 MB |
| Requires iOS | **9.1** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPod, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [旭日东方](https://appshunter.io/developer/1472957256) | [Davide Di Benedetto](https://appshunter.io/developer/6803840589) |

## What reviewers say

### Si

[App page](https://appshunter.io/ios/app/si-link/id1484583420)

**Features:** macOS Compatibility

**In-app purchases:** none


### Deeck

[App page](https://appshunter.io/ios/app/deeck/id6803840587)

**Features:** Apple Watch app

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Deeck Plus | $34.99 | per year |


## Frequently asked questions

### Is Si free?

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

### Is Deeck free?

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

### Do Si or Deeck have ads?

Neither Si nor Deeck shows ads.

### Which is updated more often, Si or Deeck?

Si ships an update every 5 months, and Deeck every 4 days. Most recently, Si was updated on November 11, 2026 and Deeck on November 13, 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.*