Comparison

ReefDrift vs Reef Lab

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

Head to head
About

ReefDrift

Features
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Log every reef parameter in seconds. ReefDrift calculates a Tank Stability Score — Stable, Watch, or Danger — the instant you save a reading. Catch a 0.3 dKH swing before it costs $500 in coral. No account. No cloud. Just your tank data, on your device. LOG THE BIG THREE AND EVERYTHING ELSE Alkalinity (dKH), Calcium, Magnesium — the parameters reef keepers obsess over. Plus Nitrate, Phosphate, pH, Salinity, Temperature, Ammonia, and Nitrite. Last values pre-fill automatically so a full test set takes under ten seconds, not one screen per parameter. TANK STABILITY SCORE ReefDrift calculates a Stable, Watch, or Danger score the instant you save a reading. The score weights every parameter against your target band and flags drift between sessions. A single alk swing from 8.4 to 7.1 dKH registers as Danger before you wonder why a frag is pale. Out-of-range chips light up on the dashboard immediately — no digging, no scrolling. DOSING CALCULATOR — WIRED TO YOUR TANK BRS 2-part, ESV B-Ionic, Red Sea Foundation, Aquaforest KH Coralline, and custom products. Enter tank volume and current reading; ReefDrift gives you the exact dose to hit your target. Works for alk, cal, mag, NO3, and PO4. The math uses your real tank volume, not a generic estimate. TREND CHARTS WITH TARGET-RANGE BANDS Every reading plotted on a line chart with your target band overlaid. See whether alkalinity is riding the top of the band, drifting toward the floor, or cycling after a large dose. Adjust the time window from 7 days to 12 months. MAINTENANCE LOG Record water changes, GFO swaps, ATO top-offs, carbon additions, and frag-tank moves. Cross-reference maintenance events against parameter charts to see what actually moved the needle. TEST REMINDERS Set a reminder per parameter or per task. ReefDrift sends a local notification on schedule — no server required. Never miss a Friday alk test again. HOME SCREEN WIDGET Your last three parameters and next task on your iPhone home screen or lock screen. See your tank status without opening the app. BUILT BY REEF HOBBYISTS We run SPS-dominant systems. We have watched a two-week alk drift destroy a $2,000 Acropora collection. We built ReefDrift because every existing option was either abandoned, clunky, cloud-first, or a bloated social network with a parameter logger bolted on. ReefDrift is ruthlessly focused: fast log, honest score, useful calculator. Nothing else. PRIVACY — YOUR DATA STAYS ON YOUR DEVICE No account. No cloud. No login. All readings are stored locally on your iPhone and never leave your device unless you export them as CSV. Nothing to hack, nothing to lose in a server outage. ReefDrift Pro: Monthly $3.99 Ā· Yearly $19.99 (save 58%) Ā· Lifetime $59.99 — unlimited tanks, no ads, home screen widget, advanced charts, dosing correlation, and PDF reports. Supports: dKH, meq/L, ppm Ā· SG, ppt Ā· °C, °F Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://lid-web-privacy.web.app/reefdrift-privacy-policy-ios.html

About

Reef Lab

Features
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Reef Lab is a logbook built for reef tanks — not a freshwater app with a saltwater mode bolted on. Talk to it instead of typing. Ask it instead of searching. Every reading, every dose and every euro that goes into the tank ends up in one place: with charts, totals and an AI that knows your system. VOICE — SAY IT, IT'S LOGGED Tap the mic and talk. Reef Lab works out what you mean and files it where it belongs: • "KH is 8.2" — reading logged • "Salifert calcium, read 6.7 millilitres" — titration reading converted and saved • "Dosed 5 ml of NoPox extra today" — one-off dose on the right pump head • "Head 2 from 4 up to 5 ml" — new daily amount, change kept in the history • "Paused the All-for-Reef" — head paused • "Changed 40 litres of water" — water change logged • "Cleaned the skimmer" — matched to your saved routine • "How much salt do I need for 10 litres?" — handed over to the AI chat When something stays unclear it asks instead of guessing, and every entry can be undone right away. AI THAT KNOWS YOUR TANK • Chat with context: volume, latest readings, livestock, dosing and equipment come along. You get millilitres per day and a safe multi-day plan, not "keep an eye on it". • Tank report: an assessment of the whole system — what is going well, what to watch, what is a real risk, and whether parameters, livestock, light and flow actually fit together. Share it straight out of the app. • Receipt scan: photograph the receipt from the store and the line items land in your inventory with price, shop, currency and date — cross-checked against the receipt total. PARAMETERS, CHARTS & TRENDS KH, calcium, magnesium, nitrate, phosphate, pH and salinity. Salifert users enter the syringe reading — the app does the conversion. • Charts per parameter over 1M, 3M, 1Y or all of it, with min, average, max and latest • All parameters normalised into one chart to see what moves together • Traffic-light rating — optimal, marginal, critical — per entry and at a glance on the tank screen • Zone reference with the target corridor for every parameter DOSING Pump heads with product, element and daily amount. Pause, resume, dose by hand, change the daily rate — every change stays in the history, so you can see when you changed what and how the values answered. CARE & WATER CHANGES Water changes, cleaning, equipment service, filter media, products used, observations. Templates turn recurring jobs into one tap. INVENTORY & WHAT THE TANK REALLY COSTS Fish, corals, inverts, equipment, salt, food, test kits and media — with price, shop, date and currency. • Total cost always on screen: filter the list and the total follows • Filter by category, subcategory, tank, shop and status; sort by name, amount or date • Live counts for fish, corals and inverts — and losses • Several currencies with exchange rates, converted into your display currency DIARY, CALENDAR, NOTES & CALCULATORS Photo diary per coral or animal, a monthly calendar of everything that happened, notes and to-dos. Calculators for salt mix, salinity, parameter correction and daily consumption — the result goes straight to the pump. BUILT FOR REEFERS Softie tank, mixed reef or SPS system: several tanks side by side, offline-first with optional cloud sync, litres or gallons, °C or °F, dark mode, English and German. Free to use, including 5 AI requests a day — chat, voice and receipt scan share that budget. Note: voice input and AI answers are in German for now. Reef Lab does not replace professional advice.

Screenshots

ReefDrift4 screens
Reef Lab4 screens

Verdict

The call

The clearest difference is in-app purchases: Reef Lab at none against ReefDrift's 3. Reef Lab also leads on ads (none vs shown) and iOS requirement (15.1 vs 18.2). On price and device support there is nothing between them.

Scored on Price Ā· Rating Ā· Positive reviews Ā· Number of ratings Ā· Update frequency Ā· Ads Ā· In-app purchases Ā· Monetization Ā· Best chart rank Ā· Devices Ā· Requires iOS

CostPrice Ā· In-app purchases Ā· Ads Ā· Monetization

Both are free to download. ReefDrift sells 3 in-app purchases, starting at $3.99 per month. Reef Lab asks for nothing beyond the download.

Scorecard3 real differences Ā· 3 level
ReefDrift versus Reef Lab: the parameters behind the verdict, then further details
ParameterReefDriftReef Lab
PriceFreeFree
Update frequencyEvery 2 weeks—
AdsYesNo — better
In-app purchasesYesNo — better
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS18.215.1 — better
Further details — not scored
Size16 MB40 MB
Age rating4+4+
DeveloperMuge AkalinNullpointer Labs LLC

In-app purchases

3 purchases

ReefDrift

Subscriptions2
  • ReefDrift Pro Monthly$3.991 Month
  • ReefDrift Pro Yearly$19.991 Year
One-time1
  • ReefDrift Pro Lifetime$59.99
None

Reef Lab

No in-app purchases

Questions

Is ReefDrift free?
ReefDrift is free to download, with in-app purchases available.
Is Reef Lab free?
Reef Lab is free to download, with no in-app purchases.
Do ReefDrift or Reef Lab have ads?
ReefDrift shows ads; Reef Lab does not.

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