# ReefFlow: Reef Tank Tracker — Local-first reef log & alerts

> Local-first reef log & alerts (iPhone/iPad app by TZU HSUN LIN.)

- Source: https://appshunter.io/ios/app/reefflow-reef-tank-tracker/id6787981670 (this page in markdown: same URL + `.md`)
- Developer: [TZU HSUN LIN](https://appshunter.io/developer/6787814422)
- Category: Lifestyle, Utilities
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 15.1 · 35 MB
- Languages: American English, Indonesian, Japanese, Chinese (Simplified, China), Chinese (Traditional, Taiwan)
- Released: 2026-07-10
- Data updated: 2026-08-13
- User reviews in markdown: https://appshunter.io/ios/app/reefflow-reef-tank-tracker/id6787981670/reviews.md

## What is ReefFlow?

ReefFlow is the Local-First companion for serious aquarium keepers — saltwater and freshwater. Log your parameters in seconds and get smart, rule-based warnings before a crash — not AI gimmicks. Everything lives on your phone; your data is yours forever.

- Track saltwater (Alk/Ca/Mg…) and freshwater (GH/CO2/TDS…) parameters with trend charts
- Smart alerts: Alk swings, low Ca, salinity jumps (ATO faults), rising nutrients
- Step-by-step cycling guide for new tanks (live rock / dry rock)
- Two-Part dosing calculator
- Maintenance reminders, livestock profiles, unlimited diary
- Full JSON/CSV export — no lock-in
- 5 languages, light/dark themes
- One-time $9.99 Pro — no subscription, no annual cloud fee

Your tank. Your data. ReefFlow.

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| ReefFlow Pro | $9.99 | one-time |
| Multiple Tanks | $4.99 | one-time |
| Equipment Management | $2.99 | one-time |



## Version history (last 3 releases)

### 1.0.2 — 2026-08-11

New in ReefFlow 1.0.2:
• Added a visible diary list so saved entries are easy to find and manage.
• You can now choose which parameter items appear on the Parameters page.
• Fixed notification warning prompts and related reliability issues.
• General stability and usability improvements.

### 1.0.1 — 2026-07-10

Bug fixes and reliability improvements:
• Fixed an issue where a feature could appear unlocked after the purchase sheet was dismissed without completing payment.
• Purchases now unlock only after a payment completes, and are correctly restored across app restarts and devices.
Thanks for using ReefFlow!

### 1.0 — 2026-07-10

No release notes.

## More apps by TZU HSUN LIN

- [Muveau: Makeup Tracker](https://appshunter.io/ios/app/muveau-makeup-tracker/id6787814420)
- [Owely - IOU & Loan Ledger](https://appshunter.io/ios/app/owely-iou-and-loan-ledger/id6788934177)
- [Tailo Pet Care](https://appshunter.io/ios/app/tailo-pet-care/id6789108129)
- [Rollog: Inline Skate Tracker](https://appshunter.io/ios/app/rollog-inline-skate-tracker/id6791638361)
- [SproutMate: Plant Care](https://appshunter.io/ios/app/sproutmate-plant-care/id6796740276)

All apps by TZU HSUN LIN: https://appshunter.io/developer/6787814422

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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 2026-08-13.*