S.Tool vs OopsieWhoopsie
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
S.Tool
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What does S.Tool offer? ・ Record bowel movements, complaints, diet and medication ・ Overview in handy graphs ・ Securely share data with your healthcare providers Privacy guaranteed – Your data is securely stored according to GDPR guidelines and used exclusively for scientific research. Please note: S.Tool does not replace medical advice. Always consult your doctor for health problems.
OopsieWhoopsie
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Oopsie Whoopsie is a simple, private way to keep track of your bowel movements, so you can understand your gut and give your doctor real data instead of guesses. LOG IN SECONDS • Pick a Bristol Stool Scale type (I–VII) and a size, and you're done • Quick Log shows your three most-used types, so a record takes one tap. Tapped the wrong one? Undo it. • Optionally flag blood, mucus, pain, urgency, straining or incomplete emptying, and record the colour • Add notes on diet, medication or anything else, plus an optional photo SEE YOUR PATTERNS • Log: today's records, your logging streak, a daily timeline and this week at a glance • Week: daily rhythm, active days, averages and how your Bristol types break down • Month: a heat calendar, time-of-day patterns and a comparison with last month • History: monthly trends, your all-time Bristol mix and your best streak • Search your notes and filter all records by type KNOW WHEN TO CHECK IN Oopsie Whoopsie can show a gentle "Contact your doctor" reminder when your recent logs show a lasting run of constipation, loose stools or diarrhea, or when you flag blood or an unusual colour. You choose the thresholds. READY FOR YOUR APPOINTMENT Export a clean PDF report for any date range: totals, daily average, longest streaks, symptom counts, charts and a full list of records. You can also export to CSV or plain text. ALWAYS AT HAND • Home Screen and Lock Screen widgets, including a Quick Log widget that saves a record without opening the app • A Control Center and Action button control • Siri and Shortcuts: "Log an OopsieWhoopsie" • Daily check-in and "no record" reminders • Optional Apple Health sync for constipation, diarrhea and abdominal cramp symptoms • Designed for iPhone and iPad, with keyboard shortcuts on iPad PRIVATE BY DESIGN • Records sync only through your own private iCloud • Photos never leave your device • Lock the app with Face ID or your passcode • The app is always hidden in the app switcher, and reminders never show your records • No account needed Built with full VoiceOver and Dynamic Type support. Oopsie Whoopsie is for personal tracking only. It does not diagnose or treat any condition. If you're worried about your symptoms, please talk to a healthcare professional.
Screenshots
Verdict
The clearest difference is price: S.Tool at Free against OopsieWhoopsie's $1.99. S.Tool also leads on update cadence (every 2 months vs every 10 months) and iOS requirement (15.1 vs 18.0). On ads, in-app purchases 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
S.Tool is free to download; OopsieWhoopsie costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.
S.Tool ships an update every 2 months, OopsieWhoopsie every 10 months. Both last shipped on October 30, 2026.
| Parameter | S.Tool | OopsieWhoopsie |
|---|---|---|
| Price | Free — better | $1.99 |
| Update frequency | Every 2 months — better | Every 10 months |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPod | iPhone, iPad |
| Requires iOS | 15.1 — better | 18.0 |
| Further details — not scored | ||
| Size | 66 MB | 12 MB |
| Age rating | 12+ | 4+ |
| Developer | Katholieke Universiteit te Leuven | mysteryfiles.nl |
In-app purchases
S.Tool
No in-app purchases
OopsieWhoopsie
No in-app purchases





