# FilterFresh vs Water Purifier Diary

The clearest difference is update cadence: Water Purifier Diary at every 3 weeks against FilterFresh's every 3 months. Water Purifier Diary also leads on device support (3 vs 1) and iOS requirement (13.0 vs 18.0). On price, ads and in-app purchases there is nothing between them.

Both are free to download. FilterFresh sells 5 in-app purchases, starting at $1.99 per month and Water Purifier Diary sells 2 in-app purchases, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.

FilterFresh ships an update every 3 months, Water Purifier Diary every 3 weeks. The most recent releases landed on September 19, 2026 and September 20, 2026 respectively.

## The numbers

| Metric | FilterFresh | Water Purifier Diary |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (154 ratings)](https://appshunter.io/ios/app/filterfresh/id761966711/reviews)** | — |
| Number of ratings | **154** | — |
| Positive reviews | 84.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 3 months | **Every 3 weeks** |
| Monetization | Free with in-app purchases | — |
| Size | 29 MB | 41 MB |
| Requires iOS | 18.0 | **13.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Hawk iMedia](https://appshunter.io/developer/317366858) | [HAO CHANG KUO](https://appshunter.io/developer/1735524069) |

## What reviewers say

### FilterFresh

[App page](https://appshunter.io/ios/app/filterfresh/id761966711)

Never forget to change your filters again. This app helps you track maintenance for various filters like HVAC, water, and air purifiers. Receive timely reminders and easily log completed maintenance to stay on top of your home and appliance upkeep.

**Highlights:** Filter tracking for HVAC, water, air purifiers, and more, Customizable replacement and cleaning reminders, Widget for quick filter status overview, Log completed maintenance tasks, Track various filter types

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Subscription | $1.99 | per month |
| Annual Subscription | $14.99 | per year |
| 3 Months | $2.99 | one-time |
| 6 Months | $5.99 | one-time |
| 12 Months | $11.99 | one-time |


### Water Purifier Diary

[App page](https://appshunter.io/ios/app/water-purifier-diary/id6761051602)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro (Monthly) | $0.99 | per month |
| Pro (Yearly) | $8.99 | per year |


## Frequently asked questions

### Is FilterFresh free?

FilterFresh is free to download, with in-app purchases available.

### Is Water Purifier Diary free?

Water Purifier Diary is free to download, with in-app purchases available.

### Do FilterFresh or Water Purifier Diary have ads?

Both FilterFresh and Water Purifier Diary show ads.

### Which is updated more often, FilterFresh or Water Purifier Diary?

FilterFresh ships an update every 3 months, and Water Purifier Diary every 3 weeks. Most recently, FilterFresh was updated on September 19, 2026 and Water Purifier Diary on September 20, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*