# Bird ID vs Syn

The clearest difference is review sentiment: Syn at 70% against Bird ID's 29%. Syn also leads on in-app purchases (none vs 9). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Bird ID sells 7 in-app purchases, starting at $6.99 per month. Syn asks for nothing beyond the download.

Both ship on a similar rhythm, roughly fortnightly. The most recent releases landed on September 24, 2026 and September 11, 2026 respectively.

## The numbers

| Metric | Bird ID | Syn |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (91 ratings)](https://appshunter.io/ios/app/bird-id/id1450002184/reviews)** | — |
| Number of ratings | **91** | — |
| Positive reviews | 28.9% of reviews | **70.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Fortnightly | Fortnightly |
| Monetization | Free with in-app purchases | **Free** |
| Size | 109 MB | 37 MB |
| Requires iOS | **15.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | +4 |
| Developer | [VaultID](https://appshunter.io/developer/1411398300) | [Syngular ID](https://appshunter.io/developer/1702701596) |

## What reviewers say

### Bird ID

[App page](https://appshunter.io/ios/app/bird-id/id1450002184)

This app provides a secure cloud-based digital certificate for signing documents with legal validity. It offers enhanced security features, transaction history, and device management for a convenient digital experience.

**Highlights:** Sign documents with legal validity, Cloud-based digital certificate, Secure OTP generation, Manage Bird ID accounts, View connected devices, Transaction history tracking, Purchase credits in-app

**Features:** Vision Pro support

**In-app purchases (7)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Mensal | $6.99 | per month |
| Plano Padrão | $6.99 | per month |
| Anual | $29.99 | per year |
| Plano Padrão | $29.99 | per year |
| 1 mês | $9.99 | one-time |
| 3 meses | $17.99 | one-time |
| 1 ano | $29.99 | one-time |


### 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


## Frequently asked questions

### Is Bird ID free?

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

### Is Syn free?

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

### Do Bird ID or Syn have ads?

Neither Bird ID nor Syn shows ads.

### Which is updated more often, Bird ID or Syn?

Bird ID ships an update fortnightly, and Syn fortnightly. Most recently, Bird ID was updated on September 24, 2026 and Syn on September 11, 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.*