おなかログ - IBS 過敏性腸症候群の記録アプリ

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Everyone
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About this app

"What type of stomach do I have?"
Understand your stomach tendencies with a 3-minute self-check.

O-Naka Log is a self-care record app for those who deal with IBS (Irritable Bowel Syndrome) and stomach discomfort on a daily basis.

Easily record bowel movements, meals, fluid intake, physical condition, sleep, medication, etc., and gently review your daily stomach condition.

By recording diarrhea, constipation, abdominal pain, bloating, stress, and diet, it becomes easier to understand "when your stomach tends to feel uncomfortable."

This record app is easy to use not only for those diagnosed with IBS, but also for anyone who experiences stomach anxiety during commutes, meetings, eating out, school, or daily life.

【What you can do with this app】

■ Easy Recording
- Record bowel movements using the Bristol Stool Scale
- Record meal contents in text
- Automatic matching of FODMAP tags
- Record fluid intake in ml
- Easily record abdominal pain, bloating, stress, sleep, etc.
- Supports medication record-keeping
- Customize and record symptoms other than abdominal pain

■ FODMAP Dictionary
- Check FODMAP classifications specifically for Japanese ingredients
- Includes staples of Japanese food such as natto, miso, udon, and apples
- Provides an opportunity to review your diet and digestive health
- Helps organize "what foods tend to cause discomfort"

■ Trend Review
- Check the relationship between diet and symptoms as reference information
- Compare stress, sleep, and digestive health
- Review daily records in graphs
- Share a week's worth of records as a PDF
- Easy to use for notes before doctor visits and explanations during consultations

■ Behavioral Experiment Notebook
- A notebook for reflecting on anxieties such as "I might feel terrible if I eat this," within a small, safe range.
- Observe your own stomach tendencies by comparing predictions and results.
- A self-care function for recording insights, not success or failure.

■ SOS Breathing
- Breathing support for sudden stomach upset on trains, in meetings, or while out and about.
- A 4-4-4-4 box breathing technique to help regain composure.
- Also for those prone to stomach upset due to anxiety or tension.

■ Privacy-Conscious
• No account registration required
• Records are primarily stored on your device
• Health records will not be shared for advertising purposes

【Recommended for those who:】
• Have been diagnosed with IBS (Irritable Bowel Syndrome)
• Want to record their daily stomach problems
• Suffer from recurring diarrhea or constipation
• Are concerned about abdominal pain or bloating
• Experience stomach anxiety during commutes, meetings, school, or outings
• Want to understand the relationship between diet and stomach problems
• Want to manage their diet with FODMAPs in mind
• Want to summarize symptoms and records before a doctor's visit
• Have had difficulty explaining their stomach condition during a doctor's appointment
• Want to gradually learn about their own stomach tendencies

【What Onaka Log values】

Stomach problems significantly impact daily life.

"I feel anxious about taking the train."

"I worry about getting a stomach ache during meetings."

"I feel unwell after eating out."

"I experience alternating diarrhea and constipation."

"I can't explain my symptoms well at the hospital."

Onaka Log is a recording app designed to help people with these kinds of worries gradually organize their thoughts and feelings.

While it's not a diagnostic or treatment app, it supports users in becoming aware of their own digestive tendencies through daily recording.

【Important Notice】

• This app is not a medical device for diagnosis, treatment, or prescription.
• The trends and information displayed are for reference only and do not constitute a medical diagnosis.
• It is not a substitute for the judgment of a medical professional such as a doctor, pharmacist, or registered dietitian.
• If you experience severe abdominal pain, bloody stools, high fever, rapid weight loss, or severe dehydration, prioritize consulting a medical institution rather than relying on the app's judgment.
• The sources of medical and health-related reference information can be found in the "References" section within the app.

【About the Free Plan】

Even with the free plan, you can use basic recording functions such as bowel movements, meals, physical condition, and hydration.


Some features and data saving may require an internet connection.

[About Onaka Log Plus]

Onaka Log Plus is an optional monthly auto-renewal subscription for those who want to continue recording their data more comfortably.

Onaka Log Plus hides ads displayed after saving data and allows you to save data offline.

Please check the price and duration on the in-app purchase screen and the Google Play purchase screen.

Payment will be charged to your Google Play account.

Subscriptions automatically renew unless canceled at least 24 hours before the end of the current period.

You can cancel or manage your subscription at any time from the subscriptions management screen in the Google Play Store.

[Support]

Please contact us with any feedback or bug reports via the in-app or support page.
Updated on
Jul 17, 2026

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
This app may share these data types with third parties
Personal info, App activity and 2 others
This app may collect these data types
Personal info, Messages and 3 others
Data is encrypted in transit
Data can’t be deleted

What’s new

【みなさまの声を反映しました】
・食事記録に「食べていない」「昨日と同じ」を追加しました
 食べなかったことも記録に残せるようになり、食事と症状の分析がより正確になります
 「昨日と同じ」を選ぶと、前日の食事をそのまま記録できます
・朝・昼・夕の食事は、それぞれ1件の記録にまとまるようになりました
 同じ時間帯に記録し直したときは上書きの確認が表示されます(別の記録として保存も選べます)

【そのほかのアップデート情報】
・「今日は排便なし」の記録を、編集画面からも選べるようにしました
・一括登録でも「食べていない」「昨日と同じ」が使えるようになりました
・食事を書き直したとき、以前の写真が残らないようにしました

・そのほか、軽微な改善と不具合の修正
Content rating
Everyone
In-App Purchases
Learn more

App support

About the developer
ELECTORIA, K.K.
contact@electoria.jp
3-1-17, HONCHO KOGANEI, 東京都 184-0004 Japan
+81 90-3712-4226