Comparison

onsim vs Culprit

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

Head to head
About

onsim

Features
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β–  Personalized Workouts for You - We analyze your age, gender, resting heart rate, and health survey responses to recommend the most effective and safe target heart rate zone for you. β–  Explanations from the Experts - Get a detailed breakdown of your health status, along with the reasoning behind why you should exercise this way. β–  Weekly Goals at a Glance - Check your progress toward this week's goals at a glance and stay motivated. β–  Heart Rate Analysis by Workout - See how effective today's workout was through your heart rate graph. β–  My Health Change Report - Easily record and track your weekly changes in exercise, sleep, and overall health. β–  Building Healthy Habits Together - Share your records, grow alongside your peers, and keep your consistency going. β–  Who onsim Is For - Those who already exercise but feel they're not seeing enough results - Those who want to safely improve their fitness without pressure - Those who hesitate to start exercising due to conditions such as hypertension, diabetes, or dyslipidemia β–  Frequently Asked Questions Q. Do I really need a wearable device? - If you have a device that can measure your heart rate via Bluetooth, you'll be able to access heart rate–based workout analysis and personalized feedback for more accurate health management. To fully experience onsim's core features, we recommend connecting a device. Q. How are my target heart rate and workout duration calculated? - onsim determines your personalized target heart rate zone (Onsim Zone) and workout duration based on your age, gender, resting heart rate, and health survey responses, following the scientifically validated ACSM (American College of Sports Medicine) guidelines. Q. Where is my workout data collected from? - We use data provided by your phone and smartwatch. We collect and analyze data such as heart rate, step count, distance, calories, and workout time to provide you with reports. Q. Is this a medical service? - No. onsim is a health management and exercise guidance app. It does not replace medical diagnosis or treatment, and if you have any health concerns or are currently undergoing treatment, you must consult a medical professional. β€» This app is not a medical device and does not replace medical diagnosis, treatment, or prescription. The app is not responsible for any issues that may arise from the user's use of the information provided.

About

Culprit

Features
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Culprit helps you find the foods connected to your symptoms β€” not by guessing, but by a structured 14-day elimination phase followed by a guided reintroduction. Each tested food becomes a clear pattern, not a wild guess. WHY CULPRIT IS DIFFERENT Most tracking apps dump a food diary on you and leave you to connect the dots. Culprit runs a proven protocol: remove likely triggers for 14 days, then test them one at a time with a 72-hour washout between tests. You get to the answer in weeks, not months. HOW IT WORKS β€’ Onboarding β€” tell us your symptoms and which food groups you want to test β€’ Elimination Phase (14 days) β€” log meals and symptoms; we calculate your personal baseline β€’ Reintroduction β€” one food group at a time, with 72-hour washout between each β€’ Pattern Report β€” ranked by how often each food appeared before your symptoms FEATURES β€’ 60+ foods in the built-in database β€’ Allowed vs avoiding foods filtered by your personal plan β€’ 8-symptom daily check-in with 0–5 severity β€’ Linked-meal timing β€” connect a symptom to the meal that came before β€’ AI pattern analysis (qualitative, never diagnostic) β€’ Local reminders for test days and washout completions β€’ No HealthKit, no tracking, no third-party ads CULPRIT PRO Unlock every trigger ranking in your pattern report, with a plain-language note for each food. Notes are written by AI when you allow it; otherwise fixed wording is used. β€’ Monthly β€” $7.99 β€’ Annual β€” $59.99 (save 37%) Payment will be charged to your Apple ID account at confirmation of purchase. Subscriptions auto-renew unless cancelled at least 24 hours before the end of the current period. Manage or cancel in Apple ID Account Settings. IMPORTANT Culprit is a personal food and symptom tracker, not a medical device. It does not diagnose, cure, treat, or prevent any condition. Consult a healthcare professional for medical advice. Privacy Policy: https://ootssu.com/culprit/privacy.html Terms of Service: https://ootssu.com/culprit/terms.html

Screenshots

onsim4 screens
Culprit4 screens

Verdict

The call

The clearest difference is in-app purchases: onsim at none against Culprit's 2. onsim also leads on device support (3 vs 1). On price, update cadence, ads and iOS requirement there is nothing between them.

Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS

CostPrice Β· In-app purchases Β· Ads Β· Monetization

Both are free to download. Culprit sells 2 in-app purchases, starting at $7.99 per month. onsim asks for nothing beyond the download.

UpkeepUpdate frequency

onsim ships an update weekly, Culprit every 8 days. The most recent releases landed on November 4, 2026 and November 5, 2026 respectively.

Scorecard2 real differences Β· 4 level
onsim versus Culprit: the parameters behind the verdict, then further details
ParameteronsimCulprit
PriceFreeFree
Update frequencyWeekly β€” betterEvery 8 days
AdsNoNo
In-app purchasesNo β€” betterYes
DevicesiPhone, iPad, Apple Watch β€” betteriPhone
Requires iOS16.0 β€” better17.0
Further details β€” not scored
Size82 MB11 MB
Age rating17+12+
Developerμ—μ΄μΉ˜λΉ„μ»€λ„₯트JIYULMOM

In-app purchases

None

onsim

No in-app purchases

2 purchases

Culprit

Subscriptions2
  • Culprit Pro Monthly$7.991 Month
  • Culprit Pro Annual$59.991 Year

Questions

Is onsim free?
onsim is free to download, with no in-app purchases.
Is Culprit free?
Culprit is free to download, with in-app purchases available.
Do onsim or Culprit have ads?
Neither onsim nor Culprit shows ads.
Which is updated more often, onsim or Culprit?
onsim ships an update weekly, and Culprit every 8 days. Most recently, onsim was updated on November 4, 2026 and Culprit on November 5, 2026.

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