eMaxMobileApp vs STUNLOCKER
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
eMaxMobileApp
This app enhances the performance of compatible electric bicycle systems. It supports a wide range of displays and drive units, offering advanced optimization features. Users can find detailed compatibility information and tuning possibilities on the developer's website.
- Optimizes STePS systems
- Supports Bluetooth displays
- Compatible with various drive units
- Works with Shimano motor firmware
- Advanced tuning possibilities
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...the most advanced optimizing tool for STePS systems. All Bluetooth capable displays SC-EM800, SC-E8000, SC-E7000, SC-E6100, SW-EN600-L switch and EW-EN100 cockpit are supported! DU-EP801, DU-EP800, DU-E80X0, DU-EP600, DU-E7000, DU-E6XXX and DU-E50X0 drive units are supported. Partially compatible also with the latest Shimano motor firmware versions! See www.eMax-Tuning.com, especially the "news" and "support" section and/or get detailed & personal information via eMail from info@eMax-Tuning.com Also please check the document https://www.emax-tuning.com/eMax-possibilities.pdf for the tuning possibilities which are highly depending on the drive unit type and currently installed motor firmware version.
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 price: STUNLOCKER at Free against eMaxMobileApp's $0.99. eMaxMobileApp's advantage is rating (4.4 vs 4.0) and review sentiment (93% vs 74%). On ratings volume, 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
STUNLOCKER is free to download; eMaxMobileApp costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.
eMaxMobileApp holds the better App Store score, 4.4 against 4.0. Both are backed by a comparable volume of ratings — 14 and 24 respectively. Written reviews point the same way: 93% of eMaxMobileApp's written reviews are positive against 74% of STUNLOCKER's.
eMaxMobileApp ships an update every 3 weeks, STUNLOCKER monthly. The most recent releases landed on October 17, 2026 and October 13, 2026 respectively.
| Parameter | eMaxMobileApp | STUNLOCKER |
|---|---|---|
| Price | $0.99 | Free — better |
| Rating | 4.4 (14 ratings) — better | 4.0 (24 ratings) |
| Positive reviews | 92.6% of reviews — better | 73.6% of reviews |
| Number of ratings | 14 | 24 — better |
| Update frequency | Every 3 weeks — better | Monthly |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Best chart rank | #107 — better | — |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 13.0 | 12.1 — better |
| Further details — not scored | ||
| Size | 5 MB | 14 MB |
| Age rating | 4+ | 4+ |
| Developer | Markus Schlegel | Vadim Bukin |
Customer experience
eMaxMobileApp
STUNLOCKER
Bugs and requests
eMaxMobileApp
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
eMaxMobileApp
No in-app purchases
STUNLOCKER
No in-app purchases
