SpeedBox App vs STUNLOCKER
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
SpeedBox App
Connect to your e-bike's tuning kit via Bluetooth to control its supplementary assistance. Monitor key ride data like speed, trip time, and battery life. Manage your e-bike's performance and settings directly from your phone.
- Bluetooth e-bike tuning kit connection
- Control supplementary assistance
- Monitor trip time
- Track actual speed
- View average and maximum speed
- Monitor battery life
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You can control and read data from electric bikes equipped with the SpeedBox B.Tuning kits. You can prohibit the activation of the supplementary assistance of your electric bike motor. You have control of the functions of the tuning kit, (your tuning kit must be installed and activated), monitor drive factors (total time of your trip, actual speed , average speed, maximum speed, and battery life) plus many others.
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.
Screenshots
Verdict
The clearest difference is review sentiment: STUNLOCKER at 74% against SpeedBox App's 20%. STUNLOCKER also leads on rating (4.0 vs 3.6) and iOS requirement (12.1 vs 15.0). On price, ratings volume, update cadence and ads 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.
STUNLOCKER holds the better App Store score, 4.0 against 3.6. Both are backed by a comparable volume of ratings — 11 and 24 respectively. Written reviews point the same way: 20% of SpeedBox App's written reviews are positive against 74% of STUNLOCKER's.
Both ship on a similar rhythm, roughly monthly. The most recent releases landed on October 14, 2026 and October 5, 2026 respectively.
| Parameter | SpeedBox App | STUNLOCKER |
|---|---|---|
| Price | Free | Free |
| Rating | 3.6 (11 ratings) | 4.0 (24 ratings) — better |
| Positive reviews | 20.0% of reviews | 73.6% of reviews — better |
| Number of ratings | 11 | 24 — better |
| Update frequency | Monthly | Monthly |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 15.0 | 12.1 — better |
| Further details — not scored | ||
| Size | 6 MB | 14 MB |
| Age rating | 4+ | 4+ |
| Developer | SpeedBox Team | Vadim Bukin |
Customer experience
SpeedBox App
STUNLOCKER
Bugs and requests
SpeedBox App
Not enough reviews yet to summarise bugs or 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
In-app purchases
SpeedBox App
No in-app purchases
STUNLOCKER
No in-app purchases
