# STUNLOCKER vs MTB Shock Tune

The clearest difference is rating: MTB Shock Tune at 4.5 against STUNLOCKER's 4.0. STUNLOCKER's advantage is ratings volume (24 vs 2) and iOS requirement (12.1 vs 15.0). On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

MTB Shock Tune holds the better App Store score, 4.5 against 4.0. That said, the two scores are not equally well evidenced: STUNLOCKER has 24 ratings behind it against 2, so its average is the more settled of the two.

STUNLOCKER ships an update monthly, MTB Shock Tune every 6 weeks. The most recent releases landed on October 21, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | STUNLOCKER | MTB Shock Tune |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.0 (24 ratings)](https://appshunter.io/ios/app/stunlocker/id1470219023/reviews) | **[4.5 (2 ratings)](https://appshunter.io/ios/app/mtb-shock-tune/id1508871882/reviews)** |
| Number of ratings | **24** | 2 |
| Positive reviews | 73.6% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Monthly** | Every 6 weeks |
| Monetization | Free | Free |
| Size | 14 MB | 42 MB |
| Requires iOS | **12.1** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Vadim Bukin](https://appshunter.io/developer/1470219022) | [RYLAND LUEDERS](https://appshunter.io/developer/1508871881) |

## What reviewers say

### STUNLOCKER

[App page](https://appshunter.io/ios/app/stunlocker/id1470219023)

This application connects to Shimano E-Bike motors via Bluetooth to provide detailed information and allow customization of various settings. Users can monitor battery health, adjust assist levels, change gearing configurations, and manage light settings for a personalized riding experience.

**Highlights:** Connect via Bluetooth to Shimano E-Bike motors, View E-bike information (distance, battery health), Change assist settings, Modify gearing type and chainring size, Adjust light settings, Create presets for quick setups

**Features:** macOS Compatibility

**In-app purchases:** none

**What reviewers like**

- 🚀 Works well for many users
- 👍 Easy to use and understand
- 💡 Unlocks full potential of e-bikes
- 🚀 Quick response from developer
- 👍 Good value for money

**What reviewers complain about**

- 🐛 Does not work for some users
- 😞 Outrageous customer service (sarcastic)
- 🐛 Incompatible with certain models/firmware
- 🐛 Warranty voiding risk
- 😞 Can't buy license

**Reported bugs**

- One unit does not work
- Customer service is outrageous and sarcastic
- Does not work for changing settings to USA
- Keeps asking to turn bike off and on, use default pin, or no Bluetooth connection
- Doesn't appear to be a way to switch to imperial units

**Requested features**

- Add possibility to change full power to 600w and 100nm on EP8
- Upping the speed limiter on RS motor
- Compatibility with Speedbox
- Imperial units option
- Dark mode option


### MTB Shock Tune

[App page](https://appshunter.io/ios/app/mtb-shock-tune/id1508871882)

Analyze your mountain bike's suspension performance in real-time. This app uses your phone's accelerometer to capture and graph acceleration data, allowing you to compare different settings and optimize your ride.

**Highlights:** Real-time shock tuning, Accelerometer data capture, Graphing and analysis, Scenario comparison, Performance optimization

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

**In-app purchases:** none


## Frequently asked questions

### Is STUNLOCKER free?

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

### Is MTB Shock Tune free?

MTB Shock Tune is free to download, with no in-app purchases.

### Which has better reviews, STUNLOCKER or MTB Shock Tune?

MTB Shock Tune is rated higher. STUNLOCKER averages 4.0 out of 5 from 24 ratings, while MTB Shock Tune averages 4.5 from 2 ratings.

### Do STUNLOCKER or MTB Shock Tune have ads?

Neither STUNLOCKER nor MTB Shock Tune shows ads.

### Which is updated more often, STUNLOCKER or MTB Shock Tune?

STUNLOCKER ships an update monthly, and MTB Shock Tune every 6 weeks. Most recently, STUNLOCKER was updated on October 21, 2026 and MTB Shock Tune on October 7, 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.*