# ALL Maths Formulas Guide vs App Lock™

The clearest difference is in-app purchases: ALL Maths Formulas Guide at none against App Lock™'s 6. ALL Maths Formulas Guide also leads on ads (none vs shown) and review sentiment (50% vs 19%). On price and update cadence there is nothing between them.

Both are free to download. App Lock™ sells 6 in-app purchases, starting at $3.99 per 7 days. ALL Maths Formulas Guide asks for nothing beyond the download.

ALL Maths Formulas Guide ships an update every 2 months, App Lock™ every 5 weeks. The most recent releases landed on October 9, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | ALL Maths Formulas Guide | App Lock™ |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.5 (2.6K ratings)](https://appshunter.io/ios/app/app-lock-locked-apps-vault/id1481979331/reviews)** |
| Number of ratings | — | **2.6K** |
| Positive reviews | **50.0% of reviews** | 18.9% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 2 months | **Every 5 weeks** |
| Monetization | **Free** | Subscription |
| Size | 45 MB | 41 MB |
| Requires iOS | **8** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 17+ |
| Developer | [rana hamad khan](https://appshunter.io/developer/583293259) | [Plane Cubes](https://appshunter.io/developer/1712487303) |

## What reviewers say

### ALL Maths Formulas Guide

[App page](https://appshunter.io/ios/app/all-maths-formulas-guide/id1432157873)

Access over 2000 essential mathematics formulas covering integrals, calculus, algebra, geometry, and more. This comprehensive guide is designed for students, scientists, engineers, and analysts.

**Highlights:** 2000+ math formulas, Covers integrals, calculus, algebra, geometry, Includes trigonometry and statistics, Organized by mathematical topic, Suitable for students and professionals

**Features:** macOS Compatibility

**In-app purchases:** none


### App Lock™

[App page](https://appshunter.io/ios/app/app-lock-locked-apps-vault/id1481979331)

Secure your digital life by locking apps, protecting photos and videos in a private vault, and browsing the web anonymously. Store contacts, passwords, and notes safely with passcode protection.

**Highlights:** Lock Apps, Photo & Video Vault, Private Browser, Secure Notes & Passwords, Passcode Protection, Custom Albums

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

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Access Weekly | $3.99 | per 7 days |
| Hide Apps Pro Week | $4.99 | per 7 days |
| Premium Access Monthly | $7.99 | per month |
| Premium Access Yearly | $19.99 | per year |
| Start 7 Day Trial | $19.99 | per year |
| Hide Apps Pro Year | $39.99 | per year |

**What reviewers like**

- ⭐ Amazing
- 🔒 Privacy-focused
- 📂 Useful for storing files

**What reviewers complain about**

- 🔐 Locked content behind paywall
- 🤑 Expensive subscription
- 🔍 Misleading app description
- 🐛 Bugs and glitches
- 🤯 Frustrating user experience

**Reported bugs**

- Content locked after free trial ends
- Unable to access stored files even after subscription
- App crashes or freezes frequently

**Requested features**

- Allow access to stored content without subscription
- Provide clear information about subscription requirements
- Improve app stability and fix bugs


## Frequently asked questions

### Is ALL Maths Formulas Guide free?

ALL Maths Formulas Guide is free to download, with no in-app purchases.

### Is App Lock™ free?

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

### Do ALL Maths Formulas Guide or App Lock™ have ads?

App Lock™ shows ads; ALL Maths Formulas Guide does not.

### Which is updated more often, ALL Maths Formulas Guide or App Lock™?

ALL Maths Formulas Guide ships an update every 2 months, and App Lock™ every 5 weeks. Most recently, ALL Maths Formulas Guide was updated on October 9, 2026 and App Lock™ on October 13, 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.*