# Frag: Aquarium & Reef Tracker — Water Test Log & Tank Trends

> Water Test Log & Tank Trends (iPhone/iPad app by Andrew Osborne.)

- Source: https://appshunter.io/ios/app/frag-aquarium-and-reef-tracker/id6761782466 (this page in markdown: same URL + `.md`)
- Developer: [Andrew Osborne](https://appshunter.io/developer/1891373526)
- Category: Lifestyle
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 15.1 · 31 MB
- Languages: English
- Released: 2026-04-30
- Data updated: 2026-07-13
- User reviews in markdown: https://appshunter.io/ios/app/frag-aquarium-and-reef-tracker/id6761782466/reviews.md

## What is Frag?

Stop guessing if your tank is stable. Frag logs water parameters in seconds, shows trend charts with safe range bands, and reminds you before maintenance slips.

▸ LOG 10 PARAMETERS IN 10 SECONDS
Tap a cell, type a number, move on. pH, ammonia, nitrite, nitrate, temp, salinity, alkalinity, calcium, magnesium, phosphate — all logged before your test kit dries.

▸ SPOT TRENDS BEFORE PROBLEMS
Every parameter gets a trend chart with safe range bands. See drift at a glance — not just "what's my pH today" but "is my pH dropping?"

▸ NEVER MISS A WATER TEST
Smart reminders for water changes, filter cleaning, dosing, and testing schedules. Frag keeps track so you don't have to remember.

▸ TRACK YOUR WHOLE FISH ROOM
Multiple tanks, each with its own parameters, maintenance schedule, and livestock. Switch between tanks in one tap.

▸ KNOW BEFORE YOU ADD
Compatibility warnings flag species conflicts before you buy. Stocking calculator shows when your tank is approaching capacity.

▸ CORRELATE PARAMETERS
Overlay charts let you see two parameters side by side — spot cause and effect between alk, calcium, pH, temp, and more.

▸ SHARE & EXPORT
Share trend charts as images. Export parameter history as CSV for your records or your LFS.

WHY FRAG?
• One-time purchase — no subscription, no recurring charges, yours forever
• Offline-first — works in your fish room with no wifi
• Fast — built for speed, not for upsells
• Beautiful — designed for dark mode, easy on the eyes at 2am

STANDARD
• 1 tank with full parameter logging
• Latest values dashboard
• Maintenance reminders

PRO
• Unlimited tanks
• Trend charts with safe range bands
• Parameter overlay charts
• Compatibility warnings
• Stocking calculator
• CSV export & chart sharing

Built by an aquarist who was tired of spreadsheets.

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Frag Pro | $4.99 | one-time |



## Version history (last 2 releases)

### 1.0.1 — 2026-05-30

New app icon and refreshed product page.

### 1.0.0 — 2026-04-30

No release notes.

## More apps by Andrew Osborne

- [Shed: Reptile Feeding Tracker](https://appshunter.io/ios/app/shed-reptile-feeding-tracker/id6761770562)
- [Chaff — Home Coffee Roast Log](https://appshunter.io/ios/app/chaff-home-coffee-roast-log/id6761847486)
- [Pinset - Mushroom Grow Tracker](https://appshunter.io/ios/app/pinset-mushroom-grow-tracker/id6762012790)
- [Locus - Focus Timer](https://appshunter.io/ios/app/locus-focus-timer/id6762042345)
- [Resurface - Save for Later](https://appshunter.io/ios/app/resurface-save-for-later/id6762061952)

All apps by Andrew Osborne: https://appshunter.io/developer/1891373526

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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 2026-07-13.*