Comparison

Biorhythm vs Tuck

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

Head to head
About

Biorhythm

Understand your daily physical, emotional, and intellectual cycles. This app provides insights into your biorhythms, helping you make informed decisions and avoid potential risks by analyzing your daily, weekly, and monthly patterns.

Highlights
  • Daily biorhythm tracking
  • Physical, emotional, and intellectual cycles
  • Graph and value display
  • Future biorhythm preview
  • Share biorhythm data
  • Accurate algorithmic calculations
Features
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◉ Protect yourself by checking biorhythm daily. Stamina, judgment, emotion, etc. If you are not feeling well about the following measures, how about checking your biorhythm? If your biorhythm does not function appropriately, it is recommended to avoid unreasonable activities. Something might you don't want to happen. Biorhythm can be referenced in all areas of your life such as learning, sports and sales. ◉ It will advise your future. Suddenly, some of the celebrities faced traumas The cases showed that their biorhythms weren't good. Was it a coincidence? ◉ What is biorhythm? Biorhythm is the physiological cycle of a physical, emotional, and Intellectual. These three cycles are repeated in a uniform pattern based on your birthdays, and there is a difference in activity efficiency or ability depending on the combination of these patterns. The four rhythm cycles and calculations are as follows. d = number of days of living Physical rhythm: sin (2π d / 23) Emotional rhythm: sin (2π d / 28) Intellectual rhythm: sin (2π d / 33) Intuitive rhythm: sin (2π d / 38) Each rhythm has a value from -100 to +100, and this value indicates the status. Low stage: -100 to -1 High stage: +1 to +100 Dangerous Days: 0 (at the time of transition from + value to - value or from - value to + value) ◉ Explanation of Application function [Biorhythm] • Display the four rhythms of a user as values and graphs • Change dates easily to view biorhythms [Share] • Send biorhythm using messages or email [Information] • Summary of usage • Help • Contact the developer ◉ It is not a simple graph. • Accurate data using formal algorithms • Sophisticated and easy-to-see graphs • Send biorhythm using messages or email • Easy to use at anywhere, at anytime • Preview of future biorhythms ◉ Notification • If you have any questions, please use the email function on the app. mic apps • This is a completely free app, so no payment or subscription is required.

About

Tuck

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Tuck is a small, fastidious being who lives in your phone and is very particular about bed linen. Leave your sheets a day too long and he will make a quiet note. Leave them a week and he will reclassify your bedding. Leave them a month and he will start writing letters to authorities he invented. He means well. Set up your rooms and tell Tuck what's in each bed. Sheets, pillowcases, duvet covers, comforters, pillows, mattress protectors. Each item has its own interval. Weekly sheets, every two weeks for duvets, whatever works for you. Freshness rings show where each item stands. Notifications arrive when something is due. A yearly review tallies everything up, room by room, with commentary from Tuck. Swipe to tuck when you change the sheets. Siri and Shortcuts if you'd rather just say it. Widgets for your Home Screen and Lock Screen. Pause tracking for trips. Shorten intervals when you're sick. Works on iPhone and iPad. Syncs across your devices with iCloud. No account. No tracking. Just your beds and Tuck.

Screenshots

Biorhythm4 screens
Tuck4 screens

Verdict

The call

The clearest difference is in-app purchases: Biorhythm at none against Tuck's 3. Biorhythm also leads on update cadence (monthly vs every 3 months). Tuck's advantage is ads (none vs shown). On price, device support and iOS requirement 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. Tuck sells 3 one-off in-app purchases. Biorhythm asks for nothing beyond the download.

UpkeepUpdate frequency

Biorhythm ships an update monthly, Tuck every 3 months. The most recent releases landed on October 29, 2026 and October 25, 2026 respectively.

Scorecard3 real differences · 7 level
Biorhythm versus Tuck: the parameters behind the verdict, then further details
ParameterBiorhythmTuck
PriceFreeFree
Rating4.7 (3.9K ratings) — better—
Positive reviews84.3% of reviews—
Number of ratings3.9K — better—
Update frequencyMonthly — betterEvery 3 months
AdsYesNo — better
In-app purchasesNo — betterYes
MonetizationFree with in-app purchases—
DevicesiPhone, iPadiPhone, iPad
Requires iOS17.0 — better18.0
Further details — not scored
Size7 MB17 MB
Age rating+44+
DeveloperJeonghwan KimMartin Vang

Bugs and requests

Biorhythm

Reported bugs

2 issues
  • Birthday icon does not always function as expected
  • App freezes or crashes on some devices

Requested features

4 requests
  • Add ability to track multiple user profiles
  • Implement date/month scrolling for easier navigation
  • Provide more detailed information and explanations
  • Include option to remove ads without paid upgrade

Tuck

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

Biorhythm

No in-app purchases

3 purchases

Tuck

One-time3
  • A Fresh Pillowcase$1.99
  • New Sheets Day$4.99
  • The Whole Bed$9.99

Questions

Is Biorhythm free?
Biorhythm is free to download, with no in-app purchases.
Is Tuck free?
Tuck is free to download, with in-app purchases available.
Do Biorhythm or Tuck have ads?
Biorhythm shows ads; Tuck does not.
Which is updated more often, Biorhythm or Tuck?
Biorhythm ships an update monthly, and Tuck every 3 months. Most recently, Biorhythm was updated on October 29, 2026 and Tuck on October 25, 2026.

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