# Syn vs Sellin

The clearest difference is update cadence: Sellin at every 3 days against Syn's every 2 weeks. 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.

Syn ships an update every 2 weeks, Sellin every 3 days. The most recent releases landed on October 16, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | Syn | Sellin |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/syn/id6461774561/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 69.2% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 weeks | **Every 3 days** |
| Monetization | Free | — |
| Size | 43 MB | 36 MB |
| Requires iOS | 15.1 | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | +4 | 4+ |
| Developer | [Syngular ID](https://appshunter.io/developer/1702701596) | [Arezzo Industria e Comercio S/A.](https://appshunter.io/developer/984561182) |

## What reviewers say

### Syn

[App page](https://appshunter.io/ios/app/syn/id6461774561)

This app provides secure control over your cloud-based digital certificate. It ensures that only authorized operations, confirmed by your PIN, can be performed with your certificate. You can also use it to audit your account for security and authorized operations.

**Highlights:** Cloud digital certificate management, Exclusive control via mobile app, PIN-based authorization, Security audits, High-security storage (HSM), Operation divergence cancellation

**In-app purchases:** none


### Sellin

[App page](https://appshunter.io/ios/app/sellin/id6745105131)

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

**In-app purchases:** none


## Frequently asked questions

### Is Syn free?

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

### Is Sellin free?

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

### Do Syn or Sellin have ads?

Neither Syn nor Sellin shows ads.

### Which is updated more often, Syn or Sellin?

Syn ships an update every 2 weeks, and Sellin every 3 days. Most recently, Syn was updated on October 16, 2026 and Sellin on October 8, 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.*