Comparison

養魚日記 vs ReefDrift

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

Head to head
About

養魚日記

Features
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養魚之路必備日記 計下你的魚缸日常 ※水質測量記錄 ※生物紀錄 ※設備紀錄 ※每日事件 ※KH計算 ※簡易的計帳功能 ※陸續新增常用的小工具

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 · Yearly $19.99 (save 58%) · Lifetime $59.99 — unlimited tanks, no ads, home screen widget, advanced charts, dosing correlation, and PDF reports. Supports: dKH, meq/L, ppm · SG, ppt · °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

Screenshots

養魚日記4 screens
ReefDrift4 screens

Verdict

The call

The clearest difference is iOS requirement: 養魚日記 at 15.0 against ReefDrift's 18.2. On price, update cadence, ads and in-app purchases 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. 養魚日記 sells 1 one-off in-app purchase and ReefDrift sells 3 in-app purchases, starting at $3.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly every 2 weeks. The most recent releases landed on October 5, 2026 and October 10, 2026 respectively.

Scorecard1 real difference · 5 level
養魚日記 versus ReefDrift: the parameters behind the verdict, then further details
Parameter養魚日記ReefDrift
PriceFreeFree
Update frequencyEvery 2 weeksEvery 2 weeks
AdsYesYes
In-app purchasesYesYes
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.0 — better18.2
Further details — not scored
Size114 MB16 MB
Age rating4+4+
DeveloperChin-Hong LinMuge Akalin

In-app purchases

1 purchases

養魚日記

One-time1
  • 廣告去除$4.99
3 purchases

ReefDrift

Subscriptions2
  • ReefDrift Pro Monthly$3.991 Month
  • ReefDrift Pro Yearly$19.991 Year
One-time1
  • ReefDrift Pro Lifetime$59.99

Questions

Is 養魚日記 free?
養魚日記 is free to download, with in-app purchases available.
Is ReefDrift free?
ReefDrift is free to download, with in-app purchases available.
Do 養魚日記 or ReefDrift have ads?
Both 養魚日記 and ReefDrift show ads.
Which is updated more often, 養魚日記 or ReefDrift?
養魚日記 ships an update every 2 weeks, and ReefDrift every 2 weeks. Most recently, 養魚日記 was updated on October 5, 2026 and ReefDrift on October 10, 2026.

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