# Previnet OTP vs Tariffev

The clearest difference is in-app purchases: Previnet OTP at none against Tariffev's 3. Tariffev's advantage is review sentiment (35% vs 0%) and update cadence (every 3 weeks vs every 3 months). On price, ads and iOS requirement there is nothing between them.

Both are free to download. Tariffev sells 3 in-app purchases, starting at $1.99 per month. Previnet OTP asks for nothing beyond the download.

Previnet OTP ships an update every 3 months, Tariffev every 3 weeks. The most recent releases landed on June 24, 2026 and August 23, 2026 respectively.

## The numbers

| Metric | Previnet OTP | Tariffev |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 0.0% of reviews | **34.8% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 3 weeks** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 19 MB | 58 MB |
| Requires iOS | 16.6 | **15.1** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [PREVINET SERVIZI PER LA PREVIDENZA SPA](https://appshunter.io/developer/585612736) | [Simone Fardella](https://appshunter.io/developer/1732663206) |

## What reviewers say

### Previnet OTP

[App page](https://appshunter.io/ios/app/previnet-otp/id680474557)

This utility app generates unique, time-based verification codes for enhanced security when accessing web services. It supports multiple accounts and offers convenient activation via QR code or URL.

**Highlights:** Generates time-based verification codes, Provides enhanced security for web services, Supports multiple accounts, QR Code activation, URL activation

**Features:** macOS Compatibility

**In-app purchases:** none


### Tariffev

[App page](https://appshunter.io/ios/app/tariffev/id6478386479)

Easily compare EV charging operators to find the best prices and ensure a seamless electric driving experience. This app helps you locate and utilize charging stations efficiently.

**Highlights:** Compare EV charging operators, Find best charging prices, Enhance electric driving experience, Locate charging stations

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Mensile | $1.99 | per month |
| Premium Annuale | $19.00 | per year |
| Tariffev Lifetime | $49.99 | one-time |


## Frequently asked questions

### Is Previnet OTP free?

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

### Is Tariffev free?

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

### Do Previnet OTP or Tariffev have ads?

Neither Previnet OTP nor Tariffev shows ads.

### Which is updated more often, Previnet OTP or Tariffev?

Previnet OTP ships an update every 3 months, and Tariffev every 3 weeks. Most recently, Previnet OTP was updated on June 24, 2026 and Tariffev on August 23, 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.*