# Trans Sped OTP vs Voltrelli

The clearest difference is update cadence: Voltrelli at every 10 days against Trans Sped OTP's every 3 months. Trans Sped OTP's advantage is iOS requirement (11.0 vs 15.1). 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.

Trans Sped OTP ships an update every 3 months, Voltrelli every 10 days. The most recent releases landed on June 11, 2026 and September 17, 2026 respectively.

## The numbers

| Metric | Trans Sped OTP | Voltrelli |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[1.0 (1 ratings)](https://appshunter.io/ios/app/trans-sped-otp/id1507000103/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 8.3% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 10 days** |
| Monetization | Free | — |
| Size | 51 MB | 85 MB |
| Requires iOS | **11.0** | 15.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Trans Sped SRL](https://appshunter.io/developer/1507000102) | [Smart Business & Technologies Solutions SRL](https://appshunter.io/developer/1650374230) |

## What reviewers say

### Trans Sped OTP

[App page](https://appshunter.io/ios/app/trans-sped-otp/id1507000103)

Receive push notifications for your digital certificate to securely sign documents remotely. This offers a fast and safe method for authentication.

**Highlights:** Push notifications for digital certificates, Secure document signing, Remote authentication, Fast and safe signing process

**Features:** macOS Compatibility

**In-app purchases:** none


### Voltrelli

[App page](https://appshunter.io/ios/app/voltrelli/id6443899578)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Trans Sped OTP free?

Trans Sped OTP is free to download, with no in-app purchases.

### Is Voltrelli free?

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

### Do Trans Sped OTP or Voltrelli have ads?

Neither Trans Sped OTP nor Voltrelli shows ads.

### Which is updated more often, Trans Sped OTP or Voltrelli?

Trans Sped OTP ships an update every 3 months, and Voltrelli every 10 days. Most recently, Trans Sped OTP was updated on June 11, 2026 and Voltrelli on September 17, 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.*