Home & Workshop
Battery Inventory: Home & Tool Battery Tracker
Remotes, smoke alarms, key fobs and cordless tool packs, all in one place. Battery Inventory tells you which battery each device takes, reminds you when one is due, keeps count of the spares in your drawer, and has your tool packs charged before the job starts.
- No account needed
- Reminders are free
- Pro shared with Family Sharing
- Works offline
Know which battery needs you today.
How it works
- 01
Add your devices
Pick from smoke alarms, remotes, key fobs, scales and more, or search the code printed on the cell. The app fills in the battery type and how long it usually lasts.
- 02
Get reminded
A battery change date for every device, and a monthly test reminder for smoke and CO alarms. Today shows what needs you now.
- 03
Keep spares on hand
Count what's in the drawer. When a battery is due and you're out, it goes on the shopping list by itself.
- 04
Run the workshop
Track tool packs, chargers and tools, plan a job, and see which packs to charge first. Pack care nudges you before a pack sits full or empty too long.
A look inside
Made for iPad and iPhone Duo
More room for the whole house on a bigger screen.
On iPad and the open iPhone Duo, Battery Inventory switches to a sidebar layout, so Today, your devices, spares and the workshop sit one tap apart and the detail opens beside the list. With Pro, iCloud keeps your iPhone and iPad in step.
- Sidebar layout on iPad and the open iPhone Duo
- Lists and details side by side
- Portrait or landscape
- iCloud sync between devices with Pro
What's inside
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Reminders that make sense
Each device gets a battery change date based on how long its battery usually lasts, and learns from your real replacements. Smoke and CO alarms also get a monthly test reminder.
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Which battery does it take?
Pick a device or search the code printed on the cell. The finder knows the aliases, so a 357 is an LR44, AG13, SR44 or A76. On newer iPhones the camera can read the code for you.
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Spares and a shopping list
Count what's in the drawer so you don't buy what you already have. Anything due that you're short of lands on the shopping list.
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Room by room
Hallway, kitchen, garage, car. Every device lives in a room, so you can see what's due where at a glance.
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Tool packs, chargers and tools
Available, charging, in a tool, borrowed or missing. Label packs with printable QR codes or NFC tags and tap to open one.
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Jobs and pack care
Plan a job and see which packs to charge first. Pack care warns you before a pack sits full or empty for too long, with storage tips built in.
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Widgets and Siri
Your next battery on the Home Screen and Lock Screen. Ask Siri which battery a device takes, what's due, or log a battery change hands-free.
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No account, no ads
Open the app and start. Your data stays on your device and only syncs through your own iCloud with Pro. No ads and no tracking.
About Battery Inventory
Battery Inventory keeps track of every battery in your life, at home and in the workshop. Most homes have dozens of them: the smoke alarm in the hallway, the TV remote, the car key fob, the kitchen scale, the AirTag on your keys. Each takes a different cell, and each one dies at the worst possible moment.
Add a device and the app fills in the battery it takes and how long that battery usually lasts. Today shows what needs you now, and a reminder arrives when a change is due. Smoke and CO alarms also get a monthly test reminder. Not sure which battery a device takes? Search the code printed on the cell, or point the camera at it, and the finder matches aliases like 357, LR44, AG13 and SR44. The same lookup is on the web as the battery equivalent chart.
The spares drawer counts what you have, so you stop buying AAA batteries you already own, and anything that’s due and missing goes on the shopping list. Widgets put the next battery on your Home Screen and Lock Screen, and Siri can tell you which battery a device takes or what’s due.
The workshop side is for cordless tools. Track every pack, charger and tool, label packs with QR codes or NFC stickers, plan a job and see which packs to charge first. Pack care warns you before a lithium-ion pack sits full or empty long enough to wear it out.
There’s no account to make, no ads and no tracking. Your data stays on your device, and with Pro it syncs through your own iCloud. Battery reminders, spares and the shopping list are free. Battery Inventory Pro removes the limits, adds job planning, iCloud sync and export, and is shared with your family through Family Sharing. Available in 22 languages on iPhone and iPad.
Questions
How do I keep track of which batteries need changing?
Add each device, like a smoke alarm, remote, key fob or scale. Battery Inventory gives it a battery change date based on how long that battery usually lasts, reminds you when it's due, and learns the real interval from the changes you log.
Can it remind me to test my smoke and CO alarms?
Yes. Smoke and carbon monoxide alarms get a monthly test reminder and a battery change date. Battery Inventory only sends reminders: it can't see, test or monitor your alarms and isn't a safety device, so test them yourself and follow the maker's instructions.
How do I find out which battery a device takes?
Pick the device from the list, or search the code printed on the cell. The app knows common aliases, so searching 357 finds the LR44, also sold as AG13, SR44 and A76. On supported iPhones you can point the camera at a coin cell to read the code.
Does it work for cordless tool batteries?
Yes. Track each tool pack's brand, voltage, capacity and charge, plus your chargers and tools. Plan a job to see which packs to charge first, and tag packs with QR labels or NFC stickers to open them with a scan or a tap.
Does it need an account or internet?
No. There's no account to make, and everything works offline on your device. With Pro you can optionally sync between iPhone and iPad through your own private iCloud.
Is Battery Inventory free?
Yes, for the house. Up to 10 devices, battery and alarm test reminders, spares, the shopping list, rooms, and small and medium widgets are free. Battery Inventory Pro is an optional monthly, yearly or lifetime upgrade that removes the limits and adds job planning, iCloud sync and export.
Can my family share Pro?
Yes. Battery Inventory Pro works with Family Sharing, so one purchase covers everyone in your Family Sharing group.
Does it work on iPad?
Yes. On iPad and the open iPhone Duo it uses a sidebar layout with lists and details side by side, and with Pro your iPhone and iPad stay in sync through iCloud.
Battery reminders are free.
Up to 10 household devices, battery change and alarm test reminders, the spares drawer, the shopping list, rooms, and small and medium widgets are free. Battery Inventory Pro removes the limits and adds the workshop extras: job planning, charge-done alerts, iCloud sync, CSV and PDF export, and the large and Lock Screen widgets. Buy it monthly, yearly or once for life, and share it with your family through Family Sharing.
