DeviceGPT vs AccuBattery vs CPU-Z: Best Battery Health App for Android in 2026
“Battery health app” covers three different questions. How worn is my battery? What hardware is in this phone? And is anything else on the phone — or the phone itself — a problem? AccuBattery, CPU-Z and DeviceGPT each focus on a different one of those.
This comparison sticks to what each app says it does. AccuBattery and CPU-Z facts come from their own Google Play listing and official page, checked on 6 October 2026. DeviceGPT facts come from the shipped app. Where a listing does not mention a feature, the table says “not listed” rather than guessing.
The short answer
| Your goal | Best fit |
|---|---|
| Track battery capacity (mAh) and wear over time | AccuBattery |
| Estimated battery use per app | AccuBattery |
| Find the fastest charger and cable | AccuBattery |
| Look up chipset, cores and hardware specs | CPU-Z |
| Battery status, temperature and live watts alongside mic, camera, screen and network tests | DeviceGPT |
| Review which apps could read your screen or typing, and check the network for interception | DeviceGPT |
| A signed phone report to share with a buyer | DeviceGPT |
Battery health
AccuBattery says it measures “real battery capacity (in mAh)” from data provided by the battery charge controller, and shows how much wear the battery takes in each charge session. It includes a charge alarm to remind you to unplug, remaining charge time and remaining use time, and deep-sleep percentage. This is the closest of the three to a true degradation tracker: the more charge sessions it records, the more history you have.
CPU-Z lists battery level, status, temperature and capacity in its battery information. It is a readout, not a tracker.
DeviceGPT shows the battery health status that Android itself reports, temperature, live power draw in watts (calculated from voltage × current) with a split by component — screen, mobile network, memory and Wi-Fi — plus charging power, charger type and time to full. It logs each charge session and overnight drain. The charge-cycle count it shows is an estimate calculated from battery capacity, not a count read from the battery. DeviceGPT does not measure capacity in mAh the way AccuBattery does.
Verdict: for capacity and wear over months, AccuBattery. For a quick status, temperature and watts reading next to other phone checks, DeviceGPT.
Battery use per app
AccuBattery estimates battery use per app by combining its charge-controller measurements with which app is in the foreground, and argues that Android’s own per-app figures are built on maker-supplied power profiles.
CPU-Z: not listed.
DeviceGPT does not show per-app battery figures, because Android gives apps no per-app battery numbers. It ranks apps by screen time instead, and points you to Settings → Battery for the system’s own estimate.
Hardware specs and performance
CPU-Z is built for this: SoC name, architecture and the clock speed of each core, device brand and model, screen resolution, RAM and storage, sensor data, a thermal tab, and GPU load on certain models.
AccuBattery: not listed.
DeviceGPT shows storage, RAM and temperature in its scan, real-time FPS and frame-drop monitoring, and sleep and wake tracking. It also runs separate power experiments for the camera, display, CPU and network. For a full chipset spec sheet, CPU-Z is the more direct tool.
Hardware tests
AccuBattery and CPU-Z: not listed.
DeviceGPT includes a mic test (records, measures voice level and room noise, plays back; the recording stays on the phone), a camera check that confirms each front and rear camera opens, captures and locks focus, and a screen test with colour sweeps for dead pixels and a multi-touch check. It does not grade camera picture quality.
Privacy and security
AccuBattery says it “doesn’t require access to privacy-sensitive information”. Its listing does not describe a security check.
CPU-Z: not listed.
DeviceGPT has a security audit scored 0–100 in three sections: app privacy risk (enabled keyboards and accessibility services that could see what you type or what is on screen, apps holding mic, camera or SMS permission, advertising-ID access, sideloaded apps), network trust (DNS manipulation, SSL hijack, transparent proxies, captive portals, private DNS) and device integrity (root, developer mode, USB debugging, overlays, notification listeners, encryption). It lists risk signals; it does not detect spyware by name and is not antivirus.
Network
AccuBattery and CPU-Z: no speed test listed.
DeviceGPT includes a WiFi speed test — download, upload, ping and jitter — next to the network trust checks above.
Explanations and reports
AccuBattery and CPU-Z: not listed.
DeviceGPT is rule-based, with an optional Ask AI button that sends your scan to one of nine assistants (ChatGPT, Gemini, Claude, Perplexity, DeepSeek, Grok, Copilot, Replika, You.com) for a plain-English read. It also generates a phone report signed with an ECDSA key held in the phone’s hardware keystore, with a check code a buyer can verify.
Price and ads
AccuBattery has a Pro version that adds dark and AMOLED themes, access to history older than one day, detailed battery statistics in the notification, and no ads.
CPU-Z is ad-supported, with an in-app purchase to remove ads.
DeviceGPT shows ads; DeviceGPT Premium removes them.
Data and transparency
AccuBattery: export not listed.
CPU-Z: export not listed.
DeviceGPT exports battery and power data as CSV. Scan scores and your phone model are uploaded to its global leaderboard automatically after a scan; the full report goes to an AI assistant only if you tap Ask AI. Its source code is public on GitHub under the MIT licence.
Full comparison table
| Feature | DeviceGPT | AccuBattery | CPU-Z |
|---|---|---|---|
| Battery capacity in mAh | No | Yes | Capacity listed |
| Wear per charge session | No | Yes | Not listed |
| Battery health status & temperature | Yes | Not listed | Yes |
| Live power draw in watts | Yes | Not listed | Not listed |
| Charging current / speed | Watts, charger type, time to full | mA, time to full | Not listed |
| Per-app battery use | No (screen time instead) | Estimated | Not listed |
| Charge-cycle count | Estimate | Not listed | Not listed |
| SoC / per-core clock specs | Not a focus | Not listed | Yes |
| FPS & frame drops | Yes | Not listed | Not listed |
| Mic, camera, screen tests | Yes | Not listed | Not listed |
| Security / permission audit | Yes | Not listed | Not listed |
| WiFi speed test | Yes | Not listed | Not listed |
| Ask AI explanations | Optional | Not listed | Not listed |
| Signed phone report | Yes | Not listed | Not listed |
| CSV export | Yes | Not listed | Not listed |
| Ads | Yes, Premium removes | Pro removes | IAP removes |
| Root required | No | Not listed | Not listed |
When to use each app
Use AccuBattery if you want to follow battery capacity and wear over months, see estimated per-app use, or compare chargers and cables.
Use CPU-Z if you want to look up what hardware is inside a phone — chipset, cores, RAM, storage, screen resolution.
Use DeviceGPT if you want one scan that covers battery status and watts plus mic, camera and screen tests, a WiFi speed test, a permission and network security audit, and a signed report you can share.
Use more than one if you need both. They answer different questions and run side by side.
FAQ
Q: Does DeviceGPT replace AccuBattery for long-term battery tracking? A: No. AccuBattery measures capacity in mAh and wear per charge session. DeviceGPT logs charge sessions and shows Android’s battery health status, temperature and watts, and its cycle count is an estimate.
Q: Can I use DeviceGPT alongside CPU-Z? A: Yes. CPU-Z covers detailed hardware specs; DeviceGPT covers hardware tests, network checks and the security audit.
Q: What does DeviceGPT upload? A: Scan scores and your phone model go to the global leaderboard. Mic recordings stay on the phone, and the full report is sent to an AI assistant only when you tap Ask AI. The source code is public on GitHub.
Get DeviceGPT
Part of the DeviceGPT series. Built by Teamz Lab.
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