Forecast the replacement
Measure wear rate, project the date a Mac may reach 80% health, and catch a battery that starts ageing faster than its own trend.
Explore battery runway →WhatBattery Pro
Track every battery you own for years.
Turn today's reading into a long-term record, a replacement forecast, a charger diagnosis, and evidence you can export. £9.99 once, for up to two Macs.
Four reasons to go Pro
Forecast, diagnose, track, and prove.
Pro groups the deeper features around the decisions they help you make.
Diagnose the drain
Rank your apps by live watts, keep the top users over time, and record how every charge performs. Supported MacBook Pro models also identify chargers that are clearly undersized.
Explore power analysis →Track every device
Read iPhone and iPad batteries from the Mac, then keep monthly health and cycle history beside the Mac's own record.
Explore connected devices →Keep the evidence
Create a one-page PDF or print report, export the underlying samples as CSV or JSON, and back up long-term health history.
Explore reports and export →The long view
Know whether 91% is stable or on the way down quickly.
A single health figure has no direction. Pro keeps the history needed to show whether wear is gradual, accelerating, or approaching the point where a replacement deserves planning.
- Lifetime Analyzer for power, temperature, voltage, and charge
- Monthly health and cycle history per device
- Battery runway forecast for Macs
- Smart alerts for unusual wear and charging conditions
Diagnosis with receipts
See what drained it and how the charger performed.
Apps are ranked in real watts rather than a unitless energy score. Charging sessions preserve the delivered power, heat, and charger capability, so the diagnosis does not disappear as soon as you unplug.
- Live and historical app power
- Charge-session history
- Charger capability verdict
- Thirty-day charging-habit summary
- Threshold and wear-driven alerts
All your devices
Bring the iPhone and iPad into the same record.
Read connected-device health over USB or Wi-Fi without installing another app. Pro retains sparse, long-term health and cycle history so the devices do not vanish from view when they disconnect.
- Health, cycles, temperature, voltage, and live power
- Current-session graph
- Long-term monthly health record
- Mac and connected-device history in one tab
Free versus Pro
The free app answers “what is happening now?” Pro keeps the story.
CapabilityFreePro
Mac health, cycles, condition, live watts, temperatureIncludedIncluded
Live Bluetooth accessory levelsIncludedIncluded
Lifetime Analyzer and health historyNot includedIncluded
Battery runway and faster-wear warningNot includedIncluded
iPhone and iPad readingNot includedIncluded
App power history and charging sessionsNot includedIncluded
Charging habits, threshold alerts, and smart alertsNot includedIncluded
PDF report, print, CSV, JSON, and history backupNot includedIncluded
Accessory history, runtime estimates, and alertsNot includedIncluded
One simple licence
No subscription. No separate device plan.
One key unlocks Pro on up to two Macs. Paste it into Settings on each Mac and keep using the same key after updates.
What happens after purchase?
Stripe completes the payment and the licence key is emailed immediately. Paste it into WhatBattery's Licence settings.
What if I replace a Mac?
Contact support through the GitHub repository and a licence slot can be freed for the replacement.
What if Pro is not right for me?
Purchases have a 14-day money-back guarantee, no questions asked.
Keep enough history to know what comes next.
Unlock WhatBattery Pro once on up to two Macs.