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"Have You Replaced It?" is an app designed to help you remember when to replace household consumables.

You can register items that are easy to forget when they were last replaced, such as toothbrushes, kitchen sponges, water filter cartridges, range hood filters, insect repellents, and dehumidifiers, and check the next replacement date.

Main Features:
* Manage replacement dates and cycles for consumables
* Check items that are nearing replacement time or have passed their replacement time
* Organize items by location
* Record replacement dates as a history
* Receive replacement reminders via notifications
* Register photos and notes
* Check replacement status with reports
* Data sharing and synchronization (up to 3 devices including the contracted device with premium)

Recommended for:
* Don't remember when you last replaced something
* Have used old items without realizing it
* Items that aren't important enough to add to a calendar, but that you don't want to forget
* Want to check replacement timings for all items in your home in one place
* Want to view the same replacement list on family members' devices

The free version has a limit on the number of items you can register.

The premium version offers features such as unlocking the item registration limit, saving up to 3 photos, and data sharing and synchronization across up to 3 devices. Premium features are also available on shared devices.

No email address or password registration is required. The sharing function uses anonymous authentication internally, and devices can be added using a sharing code or QR code.

This app is not for shopping lists or inventory management; it's simply for quickly checking "when you last replaced something" and "when you'll need it again." It does not perform automatic purchases or automatic inventory checks.