Summary
Sumai Check is a planned app for home upkeep: choose items such as air conditioner filters, smoke alarms and water filter cartridges from a list with typical replacement intervals, enter when you last did them, and get reminded when they are due.
At a glance
| Status | Under consideration — not released (not on the App Store yet) |
|---|---|
| For | Owners and renters who forget home maintenance (a US survey found 29% of people never change their air filter) |
| Main features | A list with typical intervals, reminders from the last date, part number notes, a maintenance history |
| Devices | iPhone (iOS 26 or later, planned) |
| Languages | English, Japanese and more (planned) |
| Planned pricing | Ad-supported with all features usable (not decided) |
| Data storage | On the device only. No account or sign-in |
Who it is for and what problem it solves
Home consumables are replaced at long intervals, from a few months to ten years, so people forget when they last did it. In Japan, the Fire and Disaster Management Agency warns that many home smoke alarms are now more than ten years old, raising concern about dead batteries and failures.
- Forgetting to clean air conditioner filters or replace water filter cartridges
- Not knowing when the smoke alarms were installed
- Looking up the interval for each appliance is tedious
- Not knowing the replacement part number when shopping
Screens and features (planned)
Choose from the list
- Common items with typical intervals: air conditioner filters, smoke alarms, water filter cartridges, range hood filters, water heaters, screens, drains and more (intervals cite manufacturer or official guidance)
- Pick only what your home has and enter the last date
- Change any interval yourself
Up next
- Items sorted by due date, with overdue items in color
- Tap once when done; the next due date is set automatically
Part numbers
- Notes for part numbers, stores and prices
- Photograph a part label to read the part number text
History
- A history per item (useful when moving or selling)
How it works (planned)
- Choose the items your home has
- Enter when you last did each (or today if unknown)
- Get reminded when an item is due
- Tap once to record the work
Input and output
What you enter
- Items in your home
- Last done dates
- Part numbers (optional)
What you get
- An up-next list
- Due reminders
- A maintenance history
How your data is handled
- Records stay on the device and are not sent to our servers
- No account or sign-in
- No address or photos of your home are requested
How it differs from existing apps
- Starts with typical intervals already filled in — just choose
- Intervals cite their sources
- Part number notes make buying replacements easy
What this app does not do
- It does not refer you to or sell leads to repair companies
- It does not judge appliance faults or safety. Contact the manufacturer or a professional if something seems wrong
Frequently asked questions
Is Sumai Check available now?
No. It is under consideration and not on the App Store. This page describes the plan.
Is there an app that reminds me to change my air filter or replace my smoke alarm?
Sumai Check is a planned app that lets you pick home items from a list with typical intervals and reminds you when each is due.
Where do the intervals come from?
The plan is to cite manufacturer or official guidance for each interval. You can adjust them for your home.
What if I don't know when I last replaced something?
Start from today. For items like smoke alarms that show a manufacturing year on the unit, the app explains how to use that year.
Will it recommend contractors?
No. It does not refer you to companies. It only reminds you and keeps records.
Can renters use it?
Yes. Owners and renters choose only the items in their home.
Other languages
日本語 English 한국어 繁體中文 简体中文 Français Español Português Deutsch Italiano Türkçe العربية ไทย Tiếng Việt Bahasa Indonesia Polski
Last updated: 2026-10-25. This page describes a plan before development. No release date has been set.