# SustEarn vs MSR Control

The clearest difference is in-app purchases: SustEarn at none against MSR Control's 4. On price, update cadence, ads and device support there is nothing between them.

Both are free to download. MSR Control sells 4 in-app purchases, starting at $1.99 per 7 days. SustEarn asks for nothing beyond the download.

SustEarn ships an update every 10 days, MSR Control fortnightly. The most recent releases landed on October 2, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | SustEarn | MSR Control |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.2 (70 ratings)](https://appshunter.io/ios/app/msr-control-read-and-write/id6499517595/reviews)** |
| Number of ratings | — | **70** |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 10 days** | Fortnightly |
| Monetization | — | Free with in-app purchases |
| Size | 41 MB | 6 MB |
| Requires iOS | **12.4** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Harshit Kanodia](https://appshunter.io/developer/1456221091) | [新雨 李](https://appshunter.io/developer/1559932632) |

## What reviewers say

### SustEarn

[App page](https://appshunter.io/ios/app/sustearn/id1666982947)

**Features:** macOS Compatibility

**In-app purchases:** none


### MSR Control

[App page](https://appshunter.io/ios/app/msr-control-read-and-write/id6499517595)

This utility app allows users to manage magnetic cards using a Bluetooth-enabled MSR device. It provides functionality to read, write, and duplicate various types of magnetic stripe cards with a focus on ease of use and secure operations.

**Highlights:** Bluetooth connectivity for MSR devices, Read, write, and copy magnetic cards, User-friendly interface, Wide magnetic card compatibility, Secure transaction operations

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlimited access | $1.99 | per 7 days |
| Unlimited access | $4.99 | per month |
| Unlimited access | $9.99 | per year |
| Unlimited access | $14.99 | one-time |


## Frequently asked questions

### Is SustEarn free?

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

### Is MSR Control free?

MSR Control is free to download, with in-app purchases available.

### Do SustEarn or MSR Control have ads?

Neither SustEarn nor MSR Control shows ads.

### Which is updated more often, SustEarn or MSR Control?

SustEarn ships an update every 10 days, and MSR Control fortnightly. Most recently, SustEarn was updated on October 2, 2026 and MSR Control on October 10, 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.*