# Quick Tip CalculatorX vs Lock App

The clearest difference is in-app purchases: Quick Tip CalculatorX at none against Lock App's 2. Quick Tip CalculatorX also leads on device support (3 vs 1) and iOS requirement (13.0 vs 16.0). On price, update cadence and ads there is nothing between them.

Both are free to download. Lock App sells 2 in-app purchases, starting at $4.99 per 7 days. Quick Tip CalculatorX asks for nothing beyond the download.

Both ship on a similar rhythm, roughly weekly. The most recent releases landed on September 17, 2026 and September 21, 2026 respectively.

## The numbers

| Metric | Quick Tip CalculatorX | Lock App |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/lock-app-encryption-lock/id6476755062/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Weekly | Weekly |
| Monetization | — | Free with in-app purchases |
| Size | 25 MB | 22 MB |
| Requires iOS | **13.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [kuo ching liew](https://appshunter.io/developer/949386569) | [紫荣 雷](https://appshunter.io/developer/1586967648) |

## What reviewers say

### Quick Tip CalculatorX

[App page](https://appshunter.io/ios/app/quick-tip-calculatorx/id1619663244)

**Features:** macOS Compatibility

**In-app purchases:** none


### Lock App

[App page](https://appshunter.io/ios/app/lock-app-encryption-lock/id6476755062)

This app safeguards your privacy by encrypting applications, photos, and videos. It also offers parental controls to manage screen time and restrict app installations, ensuring a safer digital environment for children. Enhanced security features include password and facial recognition protection.

**Highlights:** Encrypt applications, games, photos, videos, and contacts, Restrict access to sensitive content, Control screen time and app installations, Digital password and face recognition security, Prevent deletion of important applications

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 周VIP会员 | $4.99 | per 7 days |
| Month VIP member | $19.99 | per month |


## Frequently asked questions

### Is Quick Tip CalculatorX free?

Quick Tip CalculatorX is free to download, with no in-app purchases.

### Is Lock App free?

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

### Do Quick Tip CalculatorX or Lock App have ads?

Neither Quick Tip CalculatorX nor Lock App shows ads.

### Which is updated more often, Quick Tip CalculatorX or Lock App?

Quick Tip CalculatorX ships an update weekly, and Lock App weekly. Most recently, Quick Tip CalculatorX was updated on September 17, 2026 and Lock App on September 21, 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.*