# App Lock vs AIDA

The clearest difference is rating: AIDA at 4.8 against App Lock's 4.3. AIDA also leads on device support (3 vs 1) and ratings volume (26 vs 7). On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. App Lock sells 3 in-app purchases, starting at $3.99 per month and AIDA sells 4 in-app purchases, starting at $4.99 per 7 days. Whichever you choose, the download price is not the number that matters.

AIDA holds the better App Store score, 4.8 against 4.3. Both are backed by a comparable volume of ratings — 7 and 26 respectively.

Both ship on a similar rhythm, roughly monthly. The most recent releases landed on October 27, 2026 and October 29, 2026 respectively.

## The numbers

| Metric | App Lock | AIDA |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.3 (7 ratings)](https://appshunter.io/ios/app/app-lock-secure-folder/id6456267824/reviews) | **[4.8 (26 ratings)](https://appshunter.io/ios/app/aida-grammar-check-corrector/id6705131596/reviews)** |
| Number of ratings | 7 | **26** |
| Positive reviews | — | 50.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Monthly | Monthly |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 31 MB | 10 MB |
| Requires iOS | 17.6 | **17.0** |
| Devices | iPhone | **iPhone, iPad, Mac** |
| Age rating | 4+ | 12+ |
| Developer | [Chetna Nakrani](https://appshunter.io/developer/1680941411) | [Tharindu Prabath](https://appshunter.io/developer/1675338074) |

## What reviewers say

### App Lock

[App page](https://appshunter.io/ios/app/app-lock-secure-folder/id6456267824)

This app offers a secure, offline solution for protecting your private photos, contacts, passwords, and notes. It prioritizes user privacy by keeping all data stored locally on your device without any internet connection or cloud synchronization.

**Highlights:** Offline photo and video vault, Contact backup and restore, Secure password manager, Encrypted notes storage, Local data storage only, Intuitive user interface

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Upgrade Premium Version | $3.99 | per month |
| Upgrade Premium Version | $24.99 | per year |
| Upgrade Premium Version | $29.99 | one-time |


### AIDA

[App page](https://appshunter.io/ios/app/aida-grammar-check-corrector/id6705131596)

This AI-powered writing assistant helps you create flawless text by correcting grammar and spelling errors while understanding context. It's designed for ease of use, making your writing professional for emails, reports, social media, and more.

**Highlights:** AI-powered grammar and spelling correction, Contextual understanding of writing, Professional text polishing, Intuitive and user-friendly interface, Versatile use cases (emails, reports, social media), Cross-platform availability (iPhone, iPad, Mac)

**Features:** Vision Pro support

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Proofread AI Premium | $4.99 | per 7 days |
| Proofread AI Premium | $19.99 | per month |
| Proofread AI Premium | $24.99 | per year |
| Proofread AI Premium | $99.99 | one-time |


## Frequently asked questions

### Is App Lock free?

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

### Is AIDA free?

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

### Which has better reviews, App Lock or AIDA?

AIDA is rated higher. App Lock averages 4.3 out of 5 from 7 ratings, while AIDA averages 4.8 from 26 ratings.

### Do App Lock or AIDA have ads?

Neither App Lock nor AIDA shows ads.

### Which is updated more often, App Lock or AIDA?

App Lock ships an update monthly, and AIDA monthly. Most recently, App Lock was updated on October 27, 2026 and AIDA 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.*