# Aquaryn: Aquarium Water Log — Compare before & after care

> Compare before & after care (iPhone/iPad app by OEZER GUEL.)

- Source: https://appshunter.io/ios/app/aquaryn-aquarium-water-log/id6809577975 (this page in markdown: same URL + `.md`)
- Developer: [OEZER GUEL](https://appshunter.io/developer/1885477760)
- Category: Lifestyle, Utilities
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 17.0 · 3 MB
- Languages: American English, German (Germany), European Spanish, Turkish
- Released: 2026-09-15
- Data updated: 2026-09-17
- User reviews in markdown: https://appshunter.io/ios/app/aquaryn-aquarium-water-log/id6809577975/reviews.md

## What is Aquaryn?

What changed around your last water change?

Aquaryn puts the nearest measurements before and after a care event side by side. Read the values, their difference and how many hours each was recorded from the event. A change in a reading is not proof that maintenance caused it.

YOUR PARAMETERS, YOUR UNITS
Create freshwater or saltwater tanks. Add the parameters you measure with your own units and optional reference ranges. Units stay consistent within each parameter history. No automatic dosing, recommended safe ranges or animal-care advice.

CARE EVENTS WITH CONTEXT
Record water changes and maintenance with dates and notes. Follow parameter trends with care-event markers. Keep livestock notes alongside your tank and export your measurements and events as CSV.

START WITH ONE TANK
Free includes one tank and 30 measurements. Existing history, maintenance records and CSV export remain accessible. Aquaryn Pro is an optional one-time purchase for unlimited tanks and measurements. No subscription.

LOCAL RECORDS, OPTIONAL ICLOUD BACKUP
Your records are stored on your device. Save a manual snapshot to your private iCloud account and restore it after confirming replacement of local records. This is not automatic sync. Restoring your own backups does not require Pro.

Made for iPhone and iPad in English, German, Spanish and Turkish. No advertising, analytics or app account.

Privacy: https://twinbroos.com/aquaryn-privacy
Support: https://twinbroos.com/aquaryn-support
Terms: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Aquaryn Pro — Lifetime | $14.99 | one-time |



## Version history (last 1 release)

### 1.0 — 2026-09-16

No release notes.

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All apps by OEZER GUEL: https://appshunter.io/developer/1885477760

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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 2026-09-17.*