# MyCellstar+Sync vs ERC Unlocker

The clearest difference is in-app purchases: MyCellstar+Sync at none against ERC Unlocker's 2. MyCellstar+Sync also leads on iOS requirement (9.0 vs 15.6). ERC Unlocker's advantage is update cadence (every 6 weeks vs every 6 months). On price, ads and device support there is nothing between them.

Both are free to download. ERC Unlocker sells 2 one-off in-app purchases. MyCellstar+Sync asks for nothing beyond the download.

MyCellstar+Sync ships an update every 6 months, ERC Unlocker every 6 weeks. The most recent releases landed on May 17, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | MyCellstar+Sync | ERC Unlocker |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[2.3 (8 ratings)](https://appshunter.io/ios/app/erc-unlocker-erc-calculator/id1347685769/reviews)** |
| Number of ratings | — | **8** |
| Positive reviews | — | 56.3% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 6 months | **Every 6 weeks** |
| Monetization | — | Free with in-app purchases |
| Size | 6 MB | 8 MB |
| Requires iOS | **9.0** | 15.6 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [CELLSTAR INDUSTRIES Co.,Ltd.](https://appshunter.io/developer/647129566) | [Zeeshan Ahmad](https://appshunter.io/developer/1320755442) |

## What reviewers say

### MyCellstar+Sync

[App page](https://appshunter.io/ios/app/mycellstar-plus-sync/id647129563)

**Features:** macOS Compatibility

**In-app purchases:** none


### ERC Unlocker

[App page](https://appshunter.io/ios/app/erc-unlocker-erc-calculator/id1347685769)

This utility app calculates ERC codes required for certain car audio and navigation systems after power interruptions. It offers a simple process to regain access to multimedia features by entering your device's serial number.

**Highlights:** Fast ERC code calculation, Supports wide range of audio units, Simple instructions, Convenient and quick access, Customer support

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Get 1 ERC Code | $9.99 | one-time |
| Get 1  68 Series ERC Code | $19.99 | one-time |


## Frequently asked questions

### Is MyCellstar+Sync free?

MyCellstar+Sync is free to download, with no in-app purchases.

### Is ERC Unlocker free?

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

### Do MyCellstar+Sync or ERC Unlocker have ads?

Neither MyCellstar+Sync nor ERC Unlocker shows ads.

### Which is updated more often, MyCellstar+Sync or ERC Unlocker?

MyCellstar+Sync ships an update every 6 months, and ERC Unlocker every 6 weeks. Most recently, MyCellstar+Sync was updated on May 17, 2026 and ERC Unlocker 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.*