# Nitrify: Aquarium Water Test — Cycle tracker & tank care log

> Cycle tracker & tank care log (iPhone/iPad app by Charith Perera.)

- Source: https://appshunter.io/ios/app/nitrify-aquarium-water-test/id6787839482 (this page in markdown: same URL + `.md`)
- Developer: [Charith Perera](https://appshunter.io/developer/1854264019)
- Category: Utilities, Lifestyle
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 26.2 · 2 MB
- Languages: American English
- Released: 2026-07-09
- Data updated: 2026-07-24
- User reviews in markdown: https://appshunter.io/ios/app/nitrify-aquarium-water-test/id6787839482/reviews.md

## What is Nitrify?

Your test kit gives you numbers. Nitrify tells you what they mean.

Log ammonia, nitrite and nitrate, and Nitrify reads where your tank is in the cycle, whether the water's safe, and what's changed since last time. Made for freshwater keepers who want an answer, not just a spreadsheet.

Know your cycle. Every test gets a stage: waiting on ammonia, the nitrite spike, finishing, or fully cycled. Pro reads your own trend to estimate when it'll finish.

Know if it's safe. A plain Safe, Watch or Act call on every reading. Pro breaks down ammonia, nitrite, nitrate, pH, GH, KH and phosphate against their target ranges, and warns you when one drifts the wrong way.

Stay on top of upkeep. Water changes, filter cleans, plant trims and dosing, all in one log. Pro adds reminders, custom schedules, and a dilution preview that shows what a 30% change does to your nitrate.

Your tanks, your data. Multiple tanks with Pro, a photo journal, a Home-Screen widget and CSV export, all synced over iCloud with no account and nothing sent to a server. Full light and dark mode.

Pay once. Free covers logging, your cycle stage, the safety verdict, one tank and iCloud sync. Nitrify Pro is a single $6.99 unlock. No subscription, no ads.

Nitrify reads your water against general freshwater ranges to guide you; it isn't a diagnosis of your tank or livestock. During a cycle, high ammonia and nitrite are normal, and the app tells you so.

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Nitrify Pro | $6.99 | one-time |



## Version history (last 1 release)

### 1.0 — 2026-07-09

No release notes.

## More apps by Charith Perera

- [EatFastTrain Complete Fitness](https://appshunter.io/ios/app/eatfasttrain-complete-fitness/id6755500959)
- [Autolyse: Sourdough Tracker](https://appshunter.io/ios/app/autolyse-sourdough-tracker/id6762701501)
- [Radia: Red Light Therapy](https://appshunter.io/ios/app/radia-red-light-therapy/id6763434758)
- [Puddle: Puppy Potty Log](https://appshunter.io/ios/app/puddle-puppy-potty-log/id6764225310)

All apps by Charith Perera: https://appshunter.io/developer/1854264019

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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 2026-07-24.*