# Proton Authenticator vs Diff Checker

The clearest difference is in-app purchases: Proton Authenticator at none against Diff Checker's 2. Proton Authenticator also leads on update cadence (weekly vs fortnightly). Diff Checker's advantage is iOS requirement (13.0 vs 17.0). On price, ads and device support there is nothing between them.

Both are free to download. Diff Checker sells 2 in-app purchases, starting at $7.99 per month. Proton Authenticator asks for nothing beyond the download.

Proton Authenticator ships an update weekly, Diff Checker fortnightly. The most recent releases landed on September 28, 2026 and September 11, 2026 respectively.

## The numbers

| Metric | Proton Authenticator | Diff Checker |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.4 (242 ratings)](https://appshunter.io/ios/app/proton-authenticator/id6741758667/reviews)** | — |
| Number of ratings | **242** | — |
| Positive reviews | 56.3% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Weekly** | Fortnightly |
| Monetization | Free | — |
| Size | 119 MB | 79 MB |
| Requires iOS | 17.0 | **13.0** |
| Devices | iPhone, iPad, Apple Watch | **iPhone, iPad, iPod, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Proton AG](https://appshunter.io/developer/979659484) | [Edusoft Limited](https://appshunter.io/developer/1836364875) |

## What reviewers say

### Proton Authenticator

[App page](https://appshunter.io/ios/app/proton-authenticator/id6741758667)

Securely manage your two-factor authentication codes with an open-source, end-to-end encrypted authenticator app. It offers seamless cross-device syncing, effortless import from other apps, and robust backup options, all protected by strict Swiss privacy laws. Take control of your digital security with a trusted and private solution.

**Highlights:** End-to-end encrypted iCloud sync, Effortless import from other authenticators, Secure backup and export, Swiss privacy by design, Open source and transparent, Offline support

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 🚀 Cross-platform support
- 🔒 Secure cloud sync
- 👍 Easy import from other authenticators
- 🚀 Convenient 'next' feature for codes

**What reviewers complain about**

- 🐛 Buggy UI (scrolling jitters, random sorting)
- 👎 Lack of customization options (pin favorites, change icons)
- 🐛 Sync/login issues on iPad

**Reported bugs**

- Sync/login loop on iPad
- 2FA input broken on non-iPhone devices
- Screen strobing on iPad
- Duplicate entries after import

**Requested features**

- PIN unlock for desktop
- Alphabetical sorting option
- Export function (not just Proton-specific backup)
- Native macOS app
- Option to hide item icons


### Diff Checker

[App page](https://appshunter.io/ios/app/diff-checker-compare-text/id6753902567)

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Subscription Monthly | $7.99 | per month |
| Premium Subscription Yearly | $49.99 | per year |


## Frequently asked questions

### Is Proton Authenticator free?

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

### Is Diff Checker free?

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

### Do Proton Authenticator or Diff Checker have ads?

Neither Proton Authenticator nor Diff Checker shows ads.

### Which is updated more often, Proton Authenticator or Diff Checker?

Proton Authenticator ships an update weekly, and Diff Checker fortnightly. Most recently, Proton Authenticator was updated on September 28, 2026 and Diff Checker 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.*