eMaxMobileApp vs Boulder Challenger
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.
Boulder Challenger
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Bring variety to your next bouldering session! Boulder Challenger gives you fresh challenges for the problems at your climbing gym. You choose the boulders – we make the rules. SOLO OR DUEL Train on your own and choose from suitable challenges. Or play with 2–6 people on one device and pick challenges for each other. MATCHED TO YOUR LEVEL Enter your maximum bouldering level and pull-up count. The app uses these values to set difficulty and strength-based tasks. YOUR CHALLENGES, YOUR CHOICE Browse the rules in Settings and turn individual challenges off or back on. Your selection stays saved on your device. TECHNIQUE, BALANCE AND STRENGTH Discover challenges for precise footwork, controlled movement and new ways to solve familiar problems. • Solo sessions with 1–20 boulders • Points and an end-of-session summary • English and German • Play offline, without an account or ads Bouldering involves a risk of injury. Follow your gym’s rules, choose suitable problems and stop a challenge whenever you feel unsafe.
Screenshots
Verdict
The clearest difference is price: Boulder Challenger at Free against eMaxMobileApp's $0.99. Boulder Challenger also leads on update cadence (every 6 days vs every 3 weeks). eMaxMobileApp's advantage is chart position (#152 vs unranked) and device support (3 vs 1). On 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
Boulder Challenger is free to download; eMaxMobileApp costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.
eMaxMobileApp ships an update every 3 weeks, Boulder Challenger every 6 days. The most recent releases landed on October 22, 2026 and October 9, 2026 respectively.
| Parameter | eMaxMobileApp | Boulder Challenger |
|---|---|---|
| Price | $0.99 | Free — better |
| Rating | 4.5 (15 ratings) — better | — |
| Positive reviews | 92.6% of reviews | — |
| Number of ratings | 15 — better | — |
| Update frequency | Every 3 weeks | Every 6 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Best chart rank | #152 — better | — |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 13.0 — better | 16.6 |
| Further details — not scored | ||
| Size | 5 MB | 21 MB |
| Age rating | 4+ | 17+ |
| Developer | Markus Schlegel | Marcel Rieger |
In-app purchases
eMaxMobileApp
No in-app purchases
Boulder Challenger
No in-app purchases
Questions
Is eMaxMobileApp free?
Is Boulder Challenger free?
Do eMaxMobileApp or Boulder Challenger have ads?
Which is updated more often, eMaxMobileApp or Boulder Challenger?
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