ReefMind vs Biotope
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
ReefMind
This AI-powered companion assists saltwater aquarium hobbyists with expert advice, species identification, and tank management. It offers features like AI chat, photo identification, and a species browser to help users make informed decisions for their reef tanks.
- AI Chat for reef keeping advice
- Photo identification for fish and coral
- Species browser with care sheets
- Tank management and parameter tracking
- Livestock compatibility checker
- Dosing calculator
- Fish SOS emergency triage
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ReefMind is an AI-powered companion for saltwater aquarium hobbyists. Whether you're setting up your first tank or managing a mature reef, ReefMind helps you make smarter decisions. Features: • AI Chat — Ask anything about reef keeping and get expert-level answers powered by Claude AI. Your chatbot knows your tank, your fish, and your water parameters. • Photo ID — Snap a photo of any fish or coral and identify it in seconds with confidence scores and alternatives. • Species Browser — Browse 490+ fish and corals with detailed care sheets, compatibility info, and care difficulty ratings. • Tank Management — Track your livestock, water parameters with charts, equipment, and get alerts when readings are out of range. • Tank Compatibility — Check if a new fish fits your tank before you buy. AI analyzes your current livestock and tank size. • Tank Rating — Get an AI score for your setup with personalized improvement tips. • Fish SOS — Emergency triage system when something looks wrong with your fish. • Dosing Calculator — AI-recommended dosing adjustments for your specific tank chemistry. • New Tank Wizard — Step-by-step guided setup for your first reef aquarium. Free to use with optional Pro subscription for enhanced limits. Terms of Use: https://reefmind.io/terms.html
Biotope
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Biotope is the most comprehensive, AI-powered aquarium management and simulation application designed to elevate your fishkeeping hobby. Whether you manage freshwater, marine, or natural biotope aquariums, keep your aquatic life thriving with our all-in-one platform! Recreate natural habitats (Amazon, Malawi, Southeast Asia, etc.) and automate your tank routines using our smart AI assistant, chemistry simulator, and aquascaping guide. KEY FEATURES: • AI-POWERED DIAGNOSTICS & ASSISTANT: Upload a photo of an issue in your tank (like algae outbreaks or fish diseases) and let our AI instantly diagnose the problem. Get detailed step-by-step treatment plans and chat with your AI assistant for any questions. • BIOTOPE COMPATIBILITY & SPECIES GUIDE: Check the co-habitation compatibility of fish, plants, and invertebrates before adding them to your tank. Explore various biotope regions and recreate authentic natural habitats in your home. • WATER CHEMISTRY SIMULATOR & PARAMETER LOGGING: Log critical values like pH, ammonia, nitrite, nitrate, and temperature. Use our interactive water chemistry simulator to visualize chemical reactions and receive instant warnings when parameters drift. • EMERGENCY RESPONSE CENTER & CALENDAR: Get instant, step-by-step emergency action plans during chemical spikes or critical outbreaks. Schedule water changes, filter maintenance, and treatments with custom push notification alerts. • AQUASCAPING & DESIGN WIZARD: Plan your tank layout from scratch. Arrange rocks, driftwood, and plants using our layout guidelines to design gorgeous aquascapes. • COMMUNITY FEED & SOCIAL CORNER: Share your aquarium setups, explore biotope designs from other hobbyists, post updates, and connect with aquarists worldwide. Your aquarium is a living ecosystem. Download Biotope today to ensure the health of your aquatic life and build the perfect natural habitat! Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is update cadence: Biotope at every 3 days against ReefMind's every 5 weeks. On price, ads, in-app purchases and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. ReefMind sells 2 in-app purchases, starting at $6.99 per month and Biotope sells 6 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.
ReefMind ships an update every 5 weeks, Biotope every 3 days. Both last shipped on October 25, 2026.
| Parameter | ReefMind | Biotope |
|---|---|---|
| Price | Free | Free |
| Rating | 1.0 (2 ratings) — better | — |
| Number of ratings | 2 — better | — |
| Update frequency | Every 5 weeks | Every 3 days — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Freemium | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.1 | 15.0 — better |
| Further details — not scored | ||
| Size | 28 MB | 84 MB |
| Age rating | 4+ | 17+ |
| Developer | Ian Fun | Kursat Ufuk Coskun |
In-app purchases
ReefMind
- Pro7 Days trial$6.991 Month
- Power$14.991 Month
Biotope
- Biotope Plus (Monthly)$4.991 Month
- Biotope Plus (Yearly)$39.991 Year
- 100 Credits$0.99
- 550 Credits (+50 Bonus)$3.99
- Remove Ads (Lifetime)$4.99
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- 1200 Credits (+200 Bonus)$9.99









