# Authenticator App! vs Gallery Slim

The clearest difference is in-app purchases: Gallery Slim at none against Authenticator App!'s 9. Gallery Slim also leads on rating (4.5 vs 4.2). Authenticator App!'s advantage is update cadence (every 4 days vs every 2 weeks). On price, ratings volume, ads and monetization model there is nothing between them.

Both are free to download. Authenticator App! sells 9 in-app purchases, starting at $4.99 per 7 days. Gallery Slim asks for nothing beyond the download.

Gallery Slim holds the better App Store score, 4.5 against 4.2. Both are backed by a comparable volume of ratings — 11 and 11 respectively.

Authenticator App! ships an update every 4 days, Gallery Slim every 2 weeks. The most recent releases landed on October 31, 2026 and October 29, 2026 respectively.

## The numbers

| Metric | Authenticator App! | Gallery Slim |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.2 (11 ratings)](https://appshunter.io/ios/app/authenticator-app/id6757789399/reviews) | **[4.5 (11 ratings)](https://appshunter.io/ios/app/gallery-slimphoto-cleaner/id6800182613/reviews)** |
| Number of ratings | 11 | 11 |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | Yes |
| Update frequency | **Every 4 days** | Every 2 weeks |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 78 MB | 45 MB |
| Requires iOS | 16.0 | 16.0 |
| Devices | iPhone | iPhone |
| Age rating | 17+ | 4+ |
| Developer | [VarMeta](https://appshunter.io/developer/1837594305) | [泽滨 朱](https://appshunter.io/developer/1892921178) |

## What reviewers say

### Authenticator App!

[App page](https://appshunter.io/ios/app/authenticator-app/id6757789399)

This app enhances online security by generating one-time passwords for two-factor and multi-factor authentication. It offers quick QR code scanning for easy account setup and supports offline code generation, ensuring access even without an internet connection. Protect your personal, work, and financial accounts with robust security features.

**Highlights:** Generate secure OTP & TOTP codes, Quick QR code scanning, Support 2FA & MFA security, Face ID & Passcode protection, Offline code generation, Manage multiple accounts, Backup & Restore functionality

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

**In-app purchases (9)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Pro Access | $4.99 | per 7 days |
| Weekly Pro Access | $6.99 | per 7 days |
| Week Premium | $9.99 | per 7 days |
| Week Pro | $9.99 | per 7 days |
| Monthly Pro Access | $19.99 | per month |
| Yearly Premium | $34.99 | per year |
| Yearly Pro | $39.99 | per year |
| Yearly Premium Access | $39.99 | per year |
| Authenticator – Lifetime Access | $59.99 | one-time |


### Gallery Slim

[App page](https://appshunter.io/ios/app/gallery-slimphoto-cleaner/id6800182613)

Effortlessly declutter your photo library by identifying and removing duplicate, similar, and large media files. Review and confirm all deletions to maintain full control over your storage.

**Highlights:** Smart Clean for duplicate and similar photos, Smart Scan for storage usage analysis, Swipe Cleanup for quick deletion, Large Video Tools with compression, Convert Live Photos to Still, Final Review before deletion

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

**In-app purchases:** none


## Frequently asked questions

### Is Authenticator App! free?

Authenticator App! is free to download, with in-app purchases available.

### Is Gallery Slim free?

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

### Which has better reviews, Authenticator App! or Gallery Slim?

Gallery Slim is rated higher. Authenticator App! averages 4.2 out of 5 from 11 ratings, while Gallery Slim averages 4.5 from 11 ratings.

### Do Authenticator App! or Gallery Slim have ads?

Both Authenticator App! and Gallery Slim show ads.

### Which is updated more often, Authenticator App! or Gallery Slim?

Authenticator App! ships an update every 4 days, and Gallery Slim every 2 weeks. Most recently, Authenticator App! was updated on October 31, 2026 and Gallery Slim on October 29, 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.*