# Convert MP3 to MP4 vs App Locker

The clearest difference is update cadence: App Locker at every 3 weeks against Convert MP3 to MP4's every 2 months. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Convert MP3 to MP4 sells 1 one-off in-app purchase and App Locker sells 4 in-app purchases, starting at $1.99 per 7 days. Whichever you choose, the download price is not the number that matters.

Convert MP3 to MP4 ships an update every 2 months, App Locker every 3 weeks. The most recent releases landed on October 18, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Convert MP3 to MP4 | App Locker |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (2 ratings)](https://appshunter.io/ios/app/app-locker-lock-apps-securely/id6754396629/reviews)** |
| Number of ratings | — | **2** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 3 weeks** |
| Monetization | — | Freemium |
| Size | 16 MB | 15 MB |
| Requires iOS | **16.0** | 16.6 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Antonio Gonzalez de la aleja german](https://appshunter.io/developer/1839645711) | [Huseyin Sefa Kucuk](https://appshunter.io/developer/1789633126) |

## What reviewers say

### Convert MP3 to MP4

[App page](https://appshunter.io/ios/app/convert-mp3-to-mp4/id6754396261)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $2.99 | one-time |


### App Locker

[App page](https://appshunter.io/ios/app/app-locker-lock-apps-securely/id6754396629)

This app restricts access to other applications on your device using Apple Screen Time. Unlock protected apps with Face ID, PIN, password, or two-factor authentication. It offers features like timed unlocks, intruder photos, and activity logs for enhanced privacy and focus.

**Highlights:** Restrict app launches via Screen Time, Unlock with Face ID, PIN, Password, or 2FA, Dual 2FA for enhanced security, Optional launch-time unlock challenges, Timed and unlimited unlock modes, Intruder photo capture, Activity logs and usage stats

**Features:** macOS Compatibility

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium 1 Week | $1.99 | per 7 days |
| Premium 1 Month | $4.99 | per month |
| Premium 1 Year | $7.99 | per year |
| Premium Version Lifetime | $9.99 | one-time |


## Frequently asked questions

### Is Convert MP3 to MP4 free?

Convert MP3 to MP4 is free to download, with in-app purchases available.

### Is App Locker free?

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

### Do Convert MP3 to MP4 or App Locker have ads?

Neither Convert MP3 to MP4 nor App Locker shows ads.

### Which is updated more often, Convert MP3 to MP4 or App Locker?

Convert MP3 to MP4 ships an update every 2 months, and App Locker every 3 weeks. Most recently, Convert MP3 to MP4 was updated on October 18, 2026 and App Locker on October 24, 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.*