Comparison

Biorhythm vs Shiori Diary

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
Read full description

◉ 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

Shiori Diary

Read full description

A line, a thought, or a whole page. Shiori Diary is a personal journal for words, photos, videos, voice and places. No account is required. Core journaling is free, with no ads. CAPTURE WHILE YOU WRITE Open Camera and choose Take Photo to show a square live preview while writing. Tap the shutter for a photo or hold it for a video with audio. Switch front and rear cameras and resize the preview. Opening the preview does not take a photo. Select photos and videos from your library, too. Each video is limited to one minute. Trim longer videos in Photos or another editor before importing. Choose video quality from ultra-low to high in Settings. Attachments appear in up to three columns and expand or play inside your diary when tapped. SPEAK YOUR THOUGHTS On supported devices, speech and video audio can be transcribed on device. Choose whether to keep the original voice recording. Captured videos include audio. REMEMBER THE WEATHER When automatic weather is enabled, Apple Weather supplies current conditions for the entry’s place, or your permitted current location if no place is selected. Coordinates sent for weather are rounded to roughly one kilometre. Entries can still be saved without weather if location or connectivity is unavailable. FIND MEMORIES ON A MAP Explore location-tagged entries on a map. Search for a place without enabling GPS, or save a place name as text without searching. Location is optional. RETURN TO YOUR DAYS Your entries are arranged into a Daily Book. Use the calendar, text search, categories, media archive and bookmarks to revisit your notes. Explore past memories and choose from multiple visual themes. KEEP YOUR RECORDS SAFE Drafts are saved locally. Deleted entries can be restored from Trash for 30 days. Optional app lock uses Face ID, Touch ID or your device passcode. Widgets let you start writing quickly. OPTIONAL SHIORI PLUS The one-time Feature Pack adds a daily reminder, media backup and restore, PDF export and a seven-day reflection report. PDF exports do not play videos. Monthly and annual subscriptions include all Feature Pack tools plus daily writing prompts, 12-month recording trends and morning and evening reminders. Eligible new subscribers can receive a one-month free trial. Subscriptions renew automatically after the trial unless cancelled in your Apple Account subscription settings. See the purchase screen for current prices and terms. Restore Purchases is available. Automatic backup is opt-in and runs during app use after you select a folder. It is not continuous sync. PRIVACY Entries are stored on your device, not a developer-operated server. Maps and place searches use Apple Maps; weather uses Apple Weather. Backups to an external destination you choose are subject to that service’s policies. Backup files are unencrypted and are not protected by app lock. Text journaling remains available without camera, microphone or location permission. Privacy Policy: https://hibi-no-shiori-support.o1o3.chatgpt.site/en/privacy Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Biorhythm4 screens
Shiori Diary4 screens

Verdict

The call

The clearest difference is in-app purchases: Biorhythm at none against Shiori Diary's 3. Shiori Diary's advantage is ads (none vs shown). On price, update cadence, 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. Shiori Diary sells 3 in-app purchases, starting at $0.99 per month. Biorhythm asks for nothing beyond the download.

UpkeepUpdate frequency

Biorhythm ships an update monthly, Shiori Diary every 2 weeks. Both last shipped on November 10, 2026.

Scorecard2 real differences · 8 level
Biorhythm versus Shiori Diary: the parameters behind the verdict, then further details
ParameterBiorhythmShiori Diary
PriceFreeFree
Rating4.7 (3.9K ratings) — better—
Positive reviews84.3% of reviews—
Number of ratings3.9K — better—
Update frequencyMonthlyEvery 2 weeks — better
AdsYesNo — better
In-app purchasesNo — betterYes
MonetizationFree with in-app purchases—
DevicesiPhone, iPad — betteriPhone
Requires iOS17.017.0
Further details — not scored
Size7 MB4 MB
Age rating+44+
DeveloperJeonghwan KimKoji Tamatsu

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

Shiori Diary

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

Biorhythm

No in-app purchases

3 purchases

Shiori Diary

Subscriptions2
  • Shiori Plus Monthly1 Month trial$0.991 Month
  • Shiori Plus Annual1 Month trial$9.991 Year
One-time1
  • Feature Pack$2.99

Questions

Is Biorhythm free?
Biorhythm is free to download, with no in-app purchases.
Is Shiori Diary free?
Shiori Diary is free to download, with in-app purchases available.
Do Biorhythm or Shiori Diary have ads?
Biorhythm shows ads; Shiori Diary does not.
Which is updated more often, Biorhythm or Shiori Diary?
Biorhythm ships an update monthly, and Shiori Diary every 2 weeks. Most recently, Biorhythm was updated on November 10, 2026 and Shiori Diary on November 10, 2026.

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