Comparison

Stool Checker vs My Nikki

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

Head to head
About

Stool Checker

Track your bowel movements and monitor digestive health. Easily log entries, view historical data in a calendar, and add notes about your condition. Features include privacy locking and multi-account support.

Highlights
  • Log bowel movement times
  • Calendar view of records
  • Add text memos for condition
  • Privacy locking
  • Multi-account system
Features
Read full description

This App can be available for checking your dooky record when did you do that at the last time. It's easy to use, just you push dooky button when you do a dooky. Constipation is one of trouble of woman. It is bad effect for your body to remain constipated. You can easily find that when did you do dooky or how many times has spent to squat at previous time You can easily check the record in calendar view which be able to note dooky condition and text memo. And this app includes some setting function: locking for privacy, multi account system for user who want to use for their children.

About

My Nikki

This app allows users to privately record daily events, thoughts, and photos in a simple, cute digital journal. It offers password protection for privacy and organizes entries into a visually appealing album format.

Highlights
  • Daily event recording
  • Photo insertion (up to 10 per day)
  • Calendar and list display
  • Password lock for privacy
  • Search function
  • Notification reminders
Read full description

Everyone is using secretly, Simple easy and cute NO. 1 diary app "My Nikki" ◆ Thanks to 3.0 million downloads of My Nikki finally appeared on iOS! ◆ "Let's look back today's day for 5 minutes before going to bed." Unlike blogs and social networking, I set daily situations in my own iPhone diary I will spell the events and pictures of the day in a simple fashion with opening the application. By spelling yourself as it is, everyday everyday changes to your own story! By displaying the diary in a list, it becomes a cute album that is beautiful and nice arranged clean every month. Correspond well to privacy concerns firmly! Since password input can be set at the time of starting, it is safe when lending a smartphone to someone. There is no worry that people can see important diaries! (※ Password can not be reissued.In regard to the setting contents, please manage firmly with individuals.) 【To this situation! 】 · Casual scenery found by walking · Delicious dishes and sweets · Cute baby of relatives · Talking with friends at family restaurant · Pleasant everyday with friendly fellows with a sense of pre-clique 【Recommended for people like this】 · Those who do not keep a diary or blog · One who wants to make a photo album · People who love Purikura · Person who wants to look back on the days in private space only of myself · Those looking for a cute memo pad · If you want to manage photos for free · Those who want to record their child's daily growth · Person who wants to record everyday cooking · Those who want to organize pictures of your pride · Those who want to record happy memories such as travel · Those who want to take care of casual situations 【Function summary】 · Fill / Edit - Image insertion from camera roll (insertable up to 10 sheets per day) · Insert image deletion · Calendar display · Register your favorite photos · List display · Moving year, moving · Today move · Password lock · Password hint display ·Change Password · Privacy support · Notification function · Search function 【Subscription】 Remove Ads $1.99/monthly Premium $2.99/monthly - Your payment will be charged to your iTunes Account once you confirm your purchase. - Your iTunes Account will be charged again when your subscription automatically renews at the end of your current subscription perior unless auto-renew is turned off at least 24 hours prior to the end of the current period. - You can manage or turn off auto-renew in your Apple ID Account Settings any time after purchase. Privacy Policy: https://myapp.anysense.co.jp/privacypolicy/ Terms of Use: https://myapp.anysense.co.jp/terms/ ******* - Website https://mynikki.life/ - Twitter https://twitter.com/mynikkifun - Facebook https://www.facebook.com/mynikkiapp

Screenshots

Stool Checker4 screens
My Nikki4 screens

Verdict

The call

The clearest difference is update cadence: My Nikki at every 3 weeks against Stool Checker's every 6 weeks. My Nikki also leads on ratings volume (31 vs 9). Stool Checker's advantage is review sentiment (83% vs 73%) and iOS requirement (12.0 vs 18.0). On price, rating, 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. Stool Checker sells 4 one-off in-app purchases and My Nikki sells 2 in-app purchases, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.7 for Stool Checker against 4.7 for My Nikki. Both are backed by a comparable volume of ratings — 9 and 31 respectively. Written reviews are what separate them: 83% of Stool Checker's written reviews are positive against 73% of My Nikki's.

UpkeepUpdate frequency

Stool Checker ships an update every 6 weeks, My Nikki every 3 weeks. Both last shipped on October 26, 2026.

Scorecard4 real differences · 6 level
Stool Checker versus My Nikki: the parameters behind the verdict, then further details
ParameterStool CheckerMy Nikki
PriceFreeFree
Rating4.7 (9 ratings)4.7 (31 ratings) — better
Positive reviews82.6% of reviews — better73.0% of reviews
Number of ratings931 — better
Update frequencyEvery 6 weeksEvery 3 weeks — better
AdsYesYes
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPod — betteriPhone
Requires iOS12.0 — better18.0
Further details — not scored
Size120 MB57 MB
Age rating4+4+
DeveloperZAIZEN Co., Ltd.AnySense Inc.

Customer experience

Stool Checker

All ratings9 ratings
Positive88.9%
Neutral11.1%
Negative0.0%
Written reviews23 reviews
Positive82.6%
Neutral4.3%
Negative13.0%

My Nikki

All ratings31 ratings
Positive96.8%
Neutral0.0%
Negative3.2%
Written reviews141 reviews
Positive73.0%
Neutral11.3%
Negative15.6%

In-app purchases

4 purchases

Stool Checker

One-time4
  • ぷーちゃん$0.99
  • ブリリーナ$0.99
  • うんこさん$0.99
Show 1 more
  • 広告非表示$2.99
2 purchases

My Nikki

Subscriptions2
  • Remove Ads$1.991 Month
  • Premium$2.991 Month

Questions

Is Stool Checker free?
Stool Checker is free to download, with in-app purchases available.
Is My Nikki free?
My Nikki is free to download, with in-app purchases available.
Which has better reviews, Stool Checker or My Nikki?
My Nikki is rated higher. Stool Checker averages 4.7 out of 5 from 9 ratings, while My Nikki averages 4.7 from 31 ratings.
Do Stool Checker or My Nikki have ads?
Both Stool Checker and My Nikki show ads.
Which is updated more often, Stool Checker or My Nikki?
Stool Checker ships an update every 6 weeks, and My Nikki every 3 weeks. Most recently, Stool Checker was updated on October 26, 2026 and My Nikki on October 26, 2026.

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