# Radio Code Master vs GRAVITY Calendar

The clearest difference is in-app purchases: GRAVITY Calendar at none against Radio Code Master's 2. GRAVITY Calendar also leads on ads (none vs shown). On price, update cadence, device support and iOS requirement there is nothing between them.

Both are free to download. Radio Code Master sells 2 one-off in-app purchases. GRAVITY Calendar asks for nothing beyond the download.

Radio Code Master ships an update fortnightly, GRAVITY Calendar every 3 weeks. The most recent releases landed on September 28, 2026 and September 14, 2026 respectively.

## The numbers

| Metric | Radio Code Master | GRAVITY Calendar |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[2.7 (3 ratings)](https://appshunter.io/ios/app/radio-code-master-unlock/id1454120777/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | 91.2% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Fortnightly** | Every 3 weeks |
| Monetization | Free with in-app purchases | — |
| Size | 73 MB | 3 MB |
| Requires iOS | 16.6 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [APPMEUP](https://appshunter.io/developer/1023725442) | [Eric Hamon](https://appshunter.io/developer/1694944275) |

## What reviewers say

### Radio Code Master

[App page](https://appshunter.io/ios/app/radio-code-master-unlock/id1454120777)

Instantly recover activation codes for Renault and Ford car stereos after a battery change. Simply find your radio's precode, enter it into the app, and receive your unlock code immediately. Get your music back without paying a dealer.

**Highlights:** Instant radio code recovery, Supports Renault and Ford vehicles, Find precode on radio label, Simple and efficient interface, Immediate unlock code generation, Informative help section

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Instant unlock | $0.99 | one-time |
| Instant unlock | $1.99 | one-time |


### GRAVITY Calendar

[App page](https://appshunter.io/ios/app/gravity-calendar/id6749583018)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Radio Code Master free?

Radio Code Master is free to download, with in-app purchases available.

### Is GRAVITY Calendar free?

GRAVITY Calendar is free to download, with no in-app purchases.

### Do Radio Code Master or GRAVITY Calendar have ads?

Radio Code Master shows ads; GRAVITY Calendar does not.

### Which is updated more often, Radio Code Master or GRAVITY Calendar?

Radio Code Master ships an update fortnightly, and GRAVITY Calendar every 3 weeks. Most recently, Radio Code Master was updated on September 28, 2026 and GRAVITY Calendar on September 14, 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.*