Comparison

MD Clock vs Reef Tank Log

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

Head to head
About

MD Clock

A beautifully designed digital clock app offering a variety of themes and customization options. It supports dynamic widgets, StandBy mode, and multiple timers and alarms, enhancing your workspace and daily routines.

Highlights
  • 24 exquisite themes
  • Liquid Glass design adaptation
  • Customizable widgets
  • StandBy mode support
  • Multiple timers and alarms
  • Refined animation and sound effects
Features
Read full description

MD Clock is a crafted clock app to accompany you in studying, working, and life. 2022 Apple Design Award finalist. ◎ 24 exquisite themes, and more to come ◎ Fully adapted to the new Liquid Glass design—dynamic and luminous ◎ Rich widgets and custom APP logo to meet your personality ◎ Perfectly supports StandBy ◎ Widgets support clear and blurred backgrounds, which are more integrated with the desktop ◎ Support multiple timers, chimes and alarms ◎ Refined animation and sound effects, polish every detail carefully * Subscription payments will be charged to your iTunes account at confirmation of your purchase. * Subscriptions will automatically renew and payment will be charged to your iTunes account unless auto-renew is turned off at least 24 hours prior to the end of the current. Privacy Policy: https://miidii.super.site/miidii-tech/privacy-policy Terms Of Use: https://miidii.super.site/miidii-tech/terms-of-use

About

Reef Tank Log

Features
Read full description

NEVER LOSE YOUR REEF DATA AGAIN. Reef Tank Log is the offline-first journal built for saltwater reef keepers. Log your parameters, schedule your dosing, and track your corals - all on your device. No account. No ads. No subscription just to write down a test result. Tired of apps that crash and wipe months of data, or suddenly lock basic logging behind a paywall? This one doesn't. Logging your parameters and backing up your data are free, forever. - TRACK EVERY PARAMETER - Salinity, alkalinity, calcium, magnesium, potassium, nitrate, phosphate, pH and temperature, logged with the exact precision reefers need (yes, salinity to 1.0255). Tag each result with the kit you used - Hanna, Salifert, Red Sea or API. - FIX A BAD READING - Fat-fingered 85 instead of 8.5? Open the reading history from the chart and edit or delete any single point. Your trend line is never stuck with a typo. - SEE THE TREND, NOT JUST THE NUMBER - Clean trend charts with your target range shaded in, so you instantly see when alkalinity is drifting. View 30 days, 90 days, a year, or all of it, with a stability readout for the window. - DOSING DONE RIGHT (Pro) - Schedule alk, calcium, magnesium and trace doses daily, every N days, or on a chosen weekday, with local reminders that fire offline. Tick a dose off in one tap. - IMPORT YOUR ICP LAB RESULTS (Pro) - Your ICP analysis comes back with twenty numbers on it. Import the whole report instead of typing any of them: a PDF, a photo of the printout, or a CSV from Oceamo or Fauna Marin. The app reads the table, converts the units, dates the readings to the day you took the sample, and shows you every value to confirm before a single one is saved. Tested with Oceamo and Fauna Marin. - A REEF-FOCUSED LIVESTOCK JOURNAL - Add corals, fish and inverts by common and scientific name, sorted into SPS, LPS, softies, fish and inverts. Keep a tagged written journal per animal to follow growth, colour and health, and mark anything fragged, sold or lost. - MAINTENANCE AND EQUIPMENT - Log water changes with percentage and cost, skimmer services, glass cleans and media swaps. Keep a list of your lights, pumps, heaters and dosers with install dates and warranty notes. - YOUR DATA STAYS YOURS - Everything is stored locally on your device. Export a full backup to Files, iCloud or Drive anytime, and restore it in one tap. No login that can lock you out. No tracking. No ads. FREE forever: • 1 tank • Unlimited parameter readings • Trend charts and stability • Livestock journal, maintenance and equipment • Full backup and restore Reef Tank Log Pro: • Unlimited tanks • Dose schedules with offline reminders • ICP lab report import - PDF, photo or CSV Logging and backup are always free. Pro is a one-time option too - because we know reefers are done with subscriptions. Built for the hobbyist who treats their reef like the living investment it is. Terms of Use: https://codeensis.com/reeftanklog/terms Privacy Policy: https://codeensis.com/reeftanklog/privacy Monthly and Yearly are auto-renewing subscriptions. Payment is charged to your Apple ID at confirmation of purchase. It renews automatically unless cancelled at least 24 hours before the end of the current period, and your account is charged for renewal within 24 hours before the period ends. Manage or cancel any time in Settings → Apple Account → Subscriptions. Lifetime is a one-time purchase and does not renew.

Screenshots

MD Clock4 screens
Reef Tank Log4 screens

Verdict

The call

The clearest difference is device support: MD Clock at 4 against Reef Tank Log's 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. MD Clock sells 14 in-app purchases, starting at $0.99 per month and Reef Tank Log 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

MD Clock ships an update every 9 days, Reef Tank Log every 5 days. The most recent releases landed on October 19, 2026 and October 18, 2026 respectively.

Scorecard1 real difference · 9 level
MD Clock versus Reef Tank Log: the parameters behind the verdict, then further details
ParameterMD ClockReef Tank Log
PriceFreeFree
Rating4.6 (6.6K ratings) — better—
Positive reviews47.5% of reviews—
Number of ratings6.6K — better—
Update frequencyEvery 9 daysEvery 5 days — better
AdsNoNo
In-app purchasesYesYes
MonetizationSubscription—
DevicesiPhone, iPad, iPod, Mac — betteriPhone, iPod
Requires iOS15.015.0
Further details — not scored
Size393 MB55 MB
Age rating4+4+
DeveloperMD StudioCODEENSIS LTD

Bugs and requests

MD Clock

Reported bugs

3 issues
  • Widgets not loading properly
  • Clock time inaccuracies
  • Subscription issues across devices

Requested features

4 requests
  • Add more free clock designs
  • Allow customization of widget backgrounds
  • Implement multi-timezone support
  • Integrate with Apple Music for alarm tones

Reef Tank Log

Not enough reviews yet to summarise bugs or requests.

In-app purchases

14 purchases

MD Clock

Subscriptions6
  • MD Clock Premium (1 MONTH)$0.991 Month
  • MD Clock Premium$1.997 Days
  • MD Clock Premium (1 YEAR)$4.491 Year
Show 3 more
  • MD Clock Premium7 Days trial$4.491 Year
  • MD Clock Premium1 Year trial$4.491 Year
  • MD Clock Premium7 Days trial$9.991 Year
One-time8
  • Black white & grey$0.99
  • Wood$0.99
  • AllTools$4.99
Show 5 more
  • All Clocks$5.99
  • MD Clock Premium$8.99
  • MD Clock Premium$9.99
  • MD Clock Premium$12.99
  • MD Clock Premium$24.99
3 purchases

Reef Tank Log

Subscriptions2
  • Pro Monthly$3.991 Month
  • Pro Annual$19.991 Year
One-time1
  • Pro Lifetime$29.99

Questions

Is MD Clock free?
MD Clock is free to download, with in-app purchases available.
Is Reef Tank Log free?
Reef Tank Log is free to download, with in-app purchases available.
Do MD Clock or Reef Tank Log have ads?
Neither MD Clock nor Reef Tank Log shows ads.
Which is updated more often, MD Clock or Reef Tank Log?
MD Clock ships an update every 9 days, and Reef Tank Log every 5 days. Most recently, MD Clock was updated on October 19, 2026 and Reef Tank Log on October 18, 2026.

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