Comparison

CoralCalc vs ReefMind

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

CoralCalc

Features
Read full description

Reef tank dosing, done precisely. Enter your water test results and get exact ml to add — based on your tank volume and your specific supplement brand. Stop doing spreadsheet math after every test. Stop using dead web calculators. CoralCalc gives you the answer in seconds. HOW IT WORKS 1. Set up your tank: enter volume, select supplement brands for Alk, Calcium, and Magnesium, and confirm target levels. 2. Enter today's test results. 3. Get exact ml to dose — with automatic safety splitting if the dose exceeds daily safe limits. SAFETY LIMITS BUILT IN CoralCalc automatically splits large doses across multiple days when they exceed daily safe limits: - Alkalinity: max 1.4 dKH per day - Calcium: max 50 ppm per day - Magnesium: max 100 ppm per day Display: "Dose X ml today. Remaining Y ml over Z more days." SUPPORTED BRANDS - Red Sea Foundation A / B / C - Brightwell Reef Code A / B - ESV B-Ionic (Alk, Calcium, Magnesium) - Seachem Reef Fusion 1 + 2 - BRS 2-Part - DIY / Custom (enter your own concentration) NOT JUST ONE-TIME CALCULATIONS Log your test results every time you dose. Build a personal history of your tank's parameters over time. See if your Alk is stable or slowly drifting. PRO FEATURES Upgrade to Pro for deeper insights: - Trend Graphs: See Alk, Calcium, and Magnesium over time with a visual chart. - Consumption Rate: After 2+ logs, the app calculates how fast your corals consume each element and recommends a daily maintenance dose. - Dosing Reminders: Daily notification so you never miss a dose. - Multiple Tank Profiles: Manage a frag tank, display tank, and QT tank separately. - Export: Download your full parameter log as CSV. PRIVACY FIRST All your tank data is stored locally on your device. No account, no cloud, no tracking. Uninstalling the app deletes all stored data. This app provides dosing estimates based on manufacturer specifications. It is not a substitute for professional aquarium advice. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

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.

Highlights
  • 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
Features
Read full description

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

Screenshots

CoralCalc3 screens
ReefMind4 screens

Verdict

The call

The clearest difference is iOS requirement: CoralCalc at 13.0 against ReefMind's 15.1. 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. CoralCalc sells 1 in-app purchase, starting at $4.99 per month and ReefMind sells 2 in-app purchases, starting at $6.99 per month. Whichever you choose, the download price is not the number that matters.

Scorecard1 real difference · 8 level
CoralCalc versus ReefMind: the parameters behind the verdict, then further details
ParameterCoralCalcReefMind
PriceFreeFree
Rating—1.0 (2 ratings) — better
Number of ratings—2 — better
Update frequency—Every 5 weeks
AdsNoNo
In-app purchasesYesYes
Monetization—Freemium
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS13.0 — better15.1
Further details — not scored
Size30 MB28 MB
Age rating4+4+
DeveloperJUHWAN PARKIan Fun

In-app purchases

1 purchases

CoralCalc

Subscriptions1
  • CoralCalc Pro7 Days trial$4.991 Month
2 purchases

ReefMind

Subscriptions2
  • Pro7 Days trial$6.991 Month
  • Power$14.991 Month

Questions

Is CoralCalc free?
CoralCalc is free to download, with in-app purchases available.
Is ReefMind free?
ReefMind is free to download, with in-app purchases available.
Do CoralCalc or ReefMind have ads?
Neither CoralCalc nor ReefMind shows ads.

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