STUNLOCKER vs MTB Shock Tune
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
STUNLOCKER
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.
- 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
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App works with Shimano E-Bike motors via Bluetooth. Allows: - Get E-bike information (total distance, battery health and etc) - Change assist settings - Change gearing type (mechanical, electrical) and chainrings size - Change light settings - Presets for quick setups of your bike - Other features depending on your bike's firmware Warning: the new EP801 and EP6 motors do not support changing advance settings (region, circumference). All other motors with the latest firmware do not support changing advanced settings via Bluetooth.
MTB Shock Tune
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.
- Real-time shock tuning
- Accelerometer data capture
- Graphing and analysis
- Scenario comparison
- Performance optimization
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Tune your mountain bike's front or rear shock for the best ride possible. This app uses your phones accelerometer to capture, graph, and analyze acceleration data in real time. The app allows the rider to record multiple settings scenarios (spring rate/PSI, compression damping and rebound damping). Then the rider can compare and analyze the scenarios to learn which transfers less acceleration to the bike and rider, reduces oscillation, etc.
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | STUNLOCKER | MTB Shock Tune |
|---|---|---|
| Price | Free | Free |
| Rating | 4.0 (24 ratings) | 4.5 (2 ratings) — better |
| Positive reviews | 73.6% of reviews | — |
| Number of ratings | 24 — better | 2 |
| Update frequency | Monthly — better | Every 6 weeks |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 12.1 — better | 15.0 |
| Further details — not scored | ||
| Size | 14 MB | 42 MB |
| Age rating | 4+ | 4+ |
| Developer | Vadim Bukin | RYLAND LUEDERS |
Customer experience
STUNLOCKER
MTB Shock Tune
Bugs and requests
STUNLOCKER
Reported bugs
14 issues- 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
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- Motor warranty void
- Premium license not working
- Does not support Mac or iPhone
- Premium features menu items don't show up
- License took about 3 mins to get in the email (positive, but implies a process)
- Email requests for optional features receive no response
- License not received after payment
- Duplicate serial number issue
- App is good, but trying to get the license is difficult
Requested features
5 requests- 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
Not enough reviews yet to summarise bugs or requests.
In-app purchases
STUNLOCKER
No in-app purchases
MTB Shock Tune
No in-app purchases
