Comparison

Gut diary vs MoodLog

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

Head to head
About

Gut diary

Track your daily physical, psychological, and social activities to understand their impact on your gut health. Record bowel habits, diet, sleep, exercise, and even moments of happiness. Sync with health data to identify patterns and contributing factors to abdominal comfort.

Highlights
  • Bowel habit tracking
  • Diet logging
  • Sleep cycle monitoring
  • Exercise recording
  • Social activity logging
  • Heart rate synchronization
  • Abdominal pain and stool shape entry
Features
Read full description

The stress or sleeping disturbance are closely associated with the changes in heart rate and result in affecting abdominal comfort, or bowel habits. “Gut diary” will help you lead healthier and happier life by tracking your physical, psychological, and social activities. You can record the daily bowel habits, diet, sleeping cycle, exercise and other social activity details on the app and synchronize with iPhone Health Kit or other wearable devices to obtain the heart rate data. By tracking your total daily activity, you maybe able to discover the certain pattern of abdominal conditions and identify the influence factor. You can also record a “little happiness” you have experienced during the day which can be a positive factor to your bowel activity. You have an easy access to the screen and can record several data at the same time. You can enter the abdominal pain and stool shape easily from Apple Watch. Please note that it is not possible to diagnose or treat someone with this application.

About

MoodLog

Easily log your daily mood, sleep, and physical condition. Track patterns with calendar and graph views. Customize what you record and set reminders to maintain consistency.

Highlights
  • Mood and sleep logging
  • Calendar and graph visualization
  • Customizable recording items
  • Reminder function
  • Dark mode support
  • Search function
Features
Read full description

This application allows you to easily record your mood and sleep. You can look back with a calendar and graph. Why don't you keep a record and check your pattern objectively? [Recommended when you...] are feeling down lately. having mood swings. are easily irritated. want to check your mood changes objectively. have an unstable sleep rhythm want to easily record your daily physical condition. want to keep track of what medications you’ve taken. want to check the relationship between mood, appetite and alcohol consumption. want to keep a diary or notes. [Recordable data] ・Morning, afternoon, and evening moods ・Sleep time ・Physical condition ・Medication ・Appetite ・Drinking ・Exercise ・Bathing ・Menstruation ・Memo [Settings menu] You can customize the items to be recorded, your mood, physical condition, etc. ・Items to be recorded ・Edit sleep time ・Edit mood ・Edit physical condition ・Reminder [Premium plan] Cat Mood Icons ad-free Touch ID / Face ID lock text output PDF output (Graphs by month. Available on iPhone with iOS 15 or later. ) [Other features] Easy search function Reminder function to prevent forgetting to input data No user registration required Dark mode support is easy on the eyes even in dark areas ---------------- License Agreement: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Gut diary4 screens
MoodLog4 screens

Verdict

The call

The clearest difference is review sentiment: MoodLog at 80% against Gut diary's 17%. Gut diary's advantage is in-app purchases (none vs 2) and ads (none vs shown). On price, update cadence and device support 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. MoodLog sells 2 in-app purchases, starting at $2.49 per month. Gut diary asks for nothing beyond the download.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly every 3 weeks. The most recent releases landed on July 28, 2026 and September 19, 2026 respectively.

Scorecard5 real differences · 5 level
Gut diary versus MoodLog: the parameters behind the verdict, then further details
ParameterGut diaryMoodLog
PriceFreeFree
Rating3.5 (2 ratings) — better—
Positive reviews16.7% of reviews80.0% of reviews — better
Number of ratings2 — better—
Update frequencyEvery 3 weeksEvery 3 weeks
AdsNo — betterYes
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPod, Apple WatchiPhone, iPad, iPod
Requires iOS10.0 — better15.0
Further details — not scored
Size53 MB7 MB
Age rating4+4+
DeveloperKeietsu YasuharaMieko Komatsu

Customer experience

Gut diary

All ratings2 ratings
Positive50.0%
Neutral50.0%
Negative0.0%
Written reviews6 reviews
Positive16.7%
Neutral50.0%
Negative33.3%

MoodLog

Written reviews50 reviews
Positive80.0%
Neutral12.0%
Negative8.0%

In-app purchases

None

Gut diary

No in-app purchases

2 purchases

MoodLog

Subscriptions2
  • Monthly Premium$2.491 Month
  • Annual Premium$21.491 Year

Questions

Is Gut diary free?
Gut diary is free to download, with no in-app purchases.
Is MoodLog free?
MoodLog is free to download, with in-app purchases available.
Do Gut diary or MoodLog have ads?
MoodLog shows ads; Gut diary does not.
Which is updated more often, Gut diary or MoodLog?
Gut diary ships an update every 3 weeks, and MoodLog every 3 weeks. Most recently, Gut diary was updated on July 28, 2026 and MoodLog on September 19, 2026.

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