# Water Purifier Diary — Filter tracking and reminders

> Filter tracking and reminders (iPhone/iPad app by HAO CHANG KUO.)

- Source: https://appshunter.io/ios/app/water-purifier-diary/id6761051602 (this page in markdown: same URL + `.md`)
- Developer: [HAO CHANG KUO](https://appshunter.io/developer/1735524069)
- Category: Utilities, Productivity
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 13.0 · 39 MB
- Languages: American English, Japanese, Korean, Chinese (Traditional, Taiwan)
- Released: 2026-03-31
- Data updated: 2026-08-01
- User reviews in markdown: https://appshunter.io/ios/app/water-purifier-diary/id6761051602/reviews.md

## What is Water Purifier Diary?

Water Purifier Diary helps you manage water purifiers, filter stages, replacement records, and reminder schedules in one place.

Create multiple purifiers, set replacement cycles for each filter stage, and keep a clear maintenance history. With push notifications, email reminders, sharing support, and premium features, Water Purifier Diary helps households stay organized and avoid missed filter replacements.

Key features:
• Manage multiple water purifiers
• Set filter stages and replacement cycles
• Record every filter replacement
• Receive due-soon and overdue reminders
• Support push and email notifications
• Share purifier access with family members
• Multi-language support
• Free and premium plans available

Suitable for under-sink purifiers, countertop systems, RO systems, faucet filters, pitchers, and other common household water purification devices.

Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| Pro (Monthly) | $0.99 | per month |
| Pro (Yearly) | $8.99 | per year |



## Version history (last 5 releases)

### 1.4.0 — 2026-07-31

Introduced a redesigned purifier setup flow with quick templates and multi-filter configuration.
Common filter types now include suggested replacement cycles and descriptions.
Set the last replacement date for each filter and start tracking immediately.
Added remaining and overdue day indicators.
Added quick filter navigation and drag-and-drop reordering.
Improved inventory visibility, data sync, account switching, and overall usability.

### 1.3.1 — 2026-05-26

Hot fix:
• Fixed several UI details and interaction issues

### 1.3.0 — 2026-05-26

What’s new:
• Added log reminders with custom time, title, and message
• Added a calendar view for filter replacement dates and log events
• Supported syncing filter replacement dates and enabled log notifications to your device calendar
• Added filter inventory management with default filter selection and auto-fill
• Batch replacement now supports each filter’s own default inventory item
• Added drag-and-drop reordering for filters with automatic reindexing after deletion
• Improved notification settings and permission guidance
• Improved cache, sync, and loading experience
• Fixed multiple UI and stability issues

### 1.2.0 — 2026-04-28

Added purifier logs for maintenance notes and event tracking
Added filter inventory management with default filter selection
Replacement records can now auto-fill from the default inventory item
Batch replacement now supports per-filter default inventory
Improved inventory and shared usage experience
Improved cache and sync flow for faster and more stable loading
Fixed multiple UI and data sync issues

### 1.1.0 — 2026-04-09

Added log feature
Fixed time picker language
Updated localization strings

## More apps by HAO CHANG KUO

- [ShareSlice - Split Bills](https://appshunter.io/ios/app/shareslice-split-bills/id6479315513)
- [Draw Lots Tool](https://appshunter.io/ios/app/draw-lots-tool/id6495065678)
- [Math Duel: Mental Math Battle](https://appshunter.io/ios/app/math-duel-mental-math-battle/id6770234325)
- [Poop Together Log](https://appshunter.io/ios/app/poop-together-log/id6778721661)

All apps by HAO CHANG KUO: https://appshunter.io/developer/1735524069

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-01.*