Amperes 4- is a battery diagnostic utility for iOS and Android that measures real-time charging and discharging current.
The App DNA
What makes this app unique?
Users hire the app to validate the performance of various USB cables and chargers, serving the need for objective hardware testing.
For Tech-savvy users and hardware enthusiasts looking to diagnose charging performance of cables, chargers, and battery health.
What does it look like?
Key features
Measures real-time charging or discharging current in mA via device hardware interface.
Visualizes charging data over time to track battery performance trends.
How much does it cost?
Monetization splits between ad-inventory on Android and a direct paid-download model on iOS.
Velocity
Maintenance developmentplatform expansionperformanceShow more...
The app exhibits a maintenance-level cadence, with only three releases identified over the last six months. Development activity is sporadic, characterized by long gaps between updates, such as the period between January and March 2026. While the latest release introduced a platform expansion to the Apple Watch, the overall trend is stable rather than growth-oriented. The development focus is primarily on platform support and minor stability improvements.
Who built it?
CrioSoft
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Medication & Injection TrackerUser Sentiment
What do users think recently?
Recent user voice shows a mixed sentiment. Users appreciate the app provides a reliable way for users to compare charging speeds across various cables and adapters and responsive developer support helps users resolve technical issues and provides a positive service experience, but report post-update performance regressions cause the app to hang indefinitely or crash during the testing process.
How are ratings & reviews evolving?
Weekly average review rating
What users say, by theme
- The app provides a reliable way for users to compare charging speeds across various cables and adapters
- Responsive developer support helps users resolve technical issues and provides a positive service experience
- Post-update performance regressions cause the app to hang indefinitely or crash during the testing process
120 of 361 recent reviews analyzed · high confidence · Mixed overall
Read the full review analysisUnlock 2 more frustration themes and 2 user requests, each backed by review evidence.
Access the full report for freeCompetition
Competitive landscape for Amperes 4- battery charge info
How's the Utilities market?
Amperes 4- sits at #73 Paid in the US Utilities category, holding a specialized diagnostic niche. The $2.99 price point on iOS creates a high barrier to entry compared to ad-supported alternatives, limiting its mass-market reach.
The rivals identified
The Analyst's Read
Key takeaways for Amperes 4- battery charge info
Where is it heading?
The utility market is consolidating around high-frequency, stable tools, leaving Amperes 4- exposed due to its slow, unreliable testing mechanism on modern operating systems. Unless the team addresses the testing hangs and improves disclosure, the app will continue to bleed users to more stable, generalized alternatives.
- Post-update performance regressions cause the app to hang indefinitely, which compounds the rating drag already visible on Android.
- User accusations of deceptive marketing regarding hardware compatibility erode trust, likely leading to increased refund requests in the coming quarter.
The SWOT
- Specialized hardware-interface measurement provides a defensible diagnostic niche
- Real-time monitoring dashboard would reduce test-time friction and improve user engagement
Next best moves
Fix testing-hang regressions in the next release because they are the #1 churn driver → stabilize the rating baseline
+ 1 more prioritized moveThe counter-intuitive read
The app's reliance on hardware-specific measurement chips is…
Read the full takeFeature gaps
Real-time monitoring dashboard (available in generalized battery monitors but missing here)
Since the last report: The app's competitive position has declined due to post-update performance regressions and user accusations of deceptive marketing regarding hardware compatibility.
Bottom line
Amperes 4- provides a reliable diagnostic mechanism for hardware enthusiasts, but the latest update's performance regressions and lack of hardware-compatibility transparency threaten its reputation, so the team must prioritize stability fixes to prevent further churn.
Unlock 1 critical friction, 1 market threat, 1 more prioritized move and the analyst’s take.
Access the full report for freeFAQ
Is Amperes 4- accurate for measuring battery health?
Why does the app show 0mA during testing?
Is Amperes 4- compatible with all Android phones?
What is the difference between the free and paid versions?
Sources
- [1] Play Store, source
Report last updated