Track Smoke-Alarm Battery Months Before Each Swap
Alarms are installed once and then live on a clock nobody watches. Subtract the months since each battery swap from its rated life and see which alarm enters the warning window first.
1 · alarm | months since the last battery swap | rated battery life months
FIRST-LOAD
Input is processed locally and a draft is saved automatically in this browser profile when storage is available. Reset to sample clears that draft; Pro history has its own clear button. A state link encodes your inputs in its URL: share only non-sensitive rows. Browser history, clipboard and anyone receiving the link may retain it. Optional AI use below leaves this device; it is not required.
Data note: Everything runs in this browser tab on the alarm battery receipt: your alarm | months since the last battery swap | rated battery life months stays on this device, nothing is uploaded, and the reading is rebuilt only when you press run.
Perspective: Before: The chirp is a last resort signal, not a schedule, and it arrives at the worst moment. After: the alarm battery receipt shows the working beside each named row so the reader can change the assumption and inspect the consequence.
2 · Read the alarm battery receipt
Interval arithmetic on the dates and rated lives you supply. Not a fire-safety certification or alarm-maintenance standard; test alarms on the schedule your manufacturer and fire authority state, and replace any unit that fails a test immediately.
Paid layer: alarm battery receipt print and history
one-time step · the free reading above stays complete
Free tier
- one complete alarm battery receipt run in the app
- three samples plus unlimited article-demo runs
- unwatermarked result text and an explicit, user-triggered state link
What $4 one-time adds
- print the alarm battery receipt with its row workings
- CSV of months remaining and row explanations
- last five reading summaries saved in this browser profile
$4 once for repeated filing of the alarm battery receipt, not for a better answer. Illustrative time basis: avoiding one five-minute manual reformat per saved reading; no market-price or guaranteed-savings claim.
Local history (this device)
- No saved runs yet — your first run files here.
Checkout is unavailable until a payment link is configured. The optional unlock is browser-local, profile-scoped and best-effort, not server-verified access. Clearing browser data can remove it; there is no account or cross-device recovery.
Boundary and sources
Interval arithmetic on the dates and rated lives you supply. Not a fire-safety certification or alarm-maintenance standard; test alarms on the schedule your manufacturer and fire authority state, and replace any unit that fails a test immediately.
- Method: Ten-year sealed units have a different arithmetic from annual cells. A rated twelve months with ten months already run leaves two months remaining.
- All sample records are invented examples. The app does not fetch measurements, policies, files or personal records.
- Google’s official pricing page, fetched 2026-09-29, lists free-tier access including AI Studio. Optional formatting only; limits and availability can change. Free-tier content may be used to improve products. Never paste private records there.
Mechanism: competence-autonomy-loop
Optional AI formatting, not calculation
For this alarm battery receipt, use the free AI Studio interface only if available to you, with no paid API key. Manual entry completes the same workflow for free. Supply only fictional or non-sensitive notes. Review its output against the source; never paste unresolved questions into the numeric rows.
Format my non-sensitive notes for a alarm battery receipt. Return plain rows only: alarm | months since the last battery swap | rated battery life months. Preserve supplied quantities exactly. Do not guess missing values; list questions separately. Do not calculate or add advice. I will check every row before pasting into the local tool.
Accepted schema: alarm | months since the last battery swap | rated battery life months. No AI response is executed as code.