Best Fat Scientist Apps

250+ iOS apps curated and reviewed

4.7 avg rating
20 free apps
Updated September 2026

With an average user rating of 4.7★, the fat scientist category is one of the App Store's strongest. Browse all 250+ apps we track, sorted so the most loved ones surface first.

Compare top Fat Scientist Apps (September 2026)

#AppPriceRatingAdsIn-App PurchasesUpdated
1Peptide Calculator: PepCalcPeptide Calculator: PepCalcFree4.7★ (378)NoNoSep 2026
2Shotsy GLP-1 TrackerShotsy GLP-1 TrackerFree4.8★ (30K)NoYesSep 2026
3Glapp — Smart GLP-1 TrackerGlapp — Smart GLP-1 TrackerFree4.7★ (869)NoYesSep 2026
4Peptide Calculator・TrackerPeptide Calculator・TrackerFree4.4★ (553)YesYesSep 2026
5BMI Calculator‰BMI Calculator‰Free4.9★ (24K)YesNoSep 2026
6DoseMate: GLP-1 TrackerDoseMate: GLP-1 TrackerFreeNoYesAug 2026
7GLP 1 Tracker : PenPal GLP1GLP 1 Tracker : PenPal GLP1Free5.0★ (1)YesYesSep 2026
8PepDose: Peptide CalculatorPepDose: Peptide CalculatorFreeNoYesJul 2026

Top Picks for Fat Scientist

Peptide Calculator: PepCalc#1

Peptide Calculator: PepCalc by David Dzeveckij

Dosage & Reconstitution Tool
Editor's Choice
🏥 Medical
4.7(378 ratings)
Free
Peptide Calculator: PepCalc screenshot 1
Peptide Calculator: PepCalc screenshot 2
Peptide Calculator: PepCalc screenshot 3

This tool simplifies peptide dosage and reconstitution calculations. It accurately determines injection volumes and the correct amount of water for mixing, converting results to insulin syringe units. Designed for researchers and wellness enthusiasts, it ensures precise and confident peptide administration.

Shotsy GLP-1 Tracker#2

Shotsy GLP-1 Tracker by Shotsy

GLP1 Shot - Zepbound, Wegovy
Strong Contender
💪 Health & Fitness
4.8😊(30K ratings)
FreeIn-App Purchases
#57in Health & Fitness
Shotsy GLP-1 Tracker screenshot 1
Shotsy GLP-1 Tracker screenshot 2
Shotsy GLP-1 Tracker screenshot 3
Shotsy GLP-1 Tracker screenshot 4
Shotsy GLP-1 Tracker screenshot 5
Shotsy GLP-1 Tracker screenshot 6

This app helps users track their GLP-1 medications for weight loss and diabetes management. It logs doses, monitors side effects, and visualizes medication levels and health progress. Stay on schedule with smart reminders and integrate with Apple Health for a comprehensive view of your journey.

What We Love

  • 💻 Easy to use
  • 📊 Helpful data visualizations
  • 🕰️ Accurate estimated medication levels
  • 📈 Effective weight loss tracking
  • 🗓️ Convenient shot tracking
  • 📝 Useful notes and journaling
  • 🤖 Integrates with health apps

Room to Improve

  • 🐛 Occasional data sync issues
  • 💰 Subscription cost may be high for some
  • 🔢 Difficulty with weight unit conversions
Glapp — Smart GLP-1 Tracker#3

Glapp — Smart GLP-1 Tracker by Glapp Inc.

Mounjaro Zepbound Wegovy GLP1
Worth Considering
💪 Health & Fitness
4.7(869 ratings)
FreeIn-App Purchases
Glapp — Smart GLP-1 Tracker screenshot 1
Glapp — Smart GLP-1 Tracker screenshot 2
Glapp — Smart GLP-1 Tracker screenshot 3
Glapp — Smart GLP-1 Tracker screenshot 4
Glapp — Smart GLP-1 Tracker screenshot 5
Glapp — Smart GLP-1 Tracker screenshot 6

Track your GLP-1 medication, monitor weight loss, and understand your body's response to treatments like Ozempic and Wegovy. This community-driven app helps you log doses, analyze effectiveness, and receive personalized tips for sustainable lifestyle changes. It also manages medication supply and prioritizes user privacy.

More Fat Scientist apps to explore

FAQ about Fat Scientist

What are the best fat scientist apps for iPhone?
Peptide Calculator: PepCalc tops our fat scientist apps ranking as of September 2026, with a 4.7-star average from 378 App Store ratings, and it's free to download.
Yes — 20 of the top fat scientist apps we rank are free to download, including Peptide Calculator: PepCalc and Shotsy GLP-1 Tracker.
Peptide Calculator: PepCalc has no ads and has no in-app purchases, according to its App Store listing as of September 2026.
We track 250+ fat scientist apps on the iOS App Store as of September 2026, ranked by rating, recency, and analysis of real user reviews.
PepCalc is a dedicated tool for calculating accurate peptide dosages and reconstitution volumes. It helps users determine precise injection amounts and the correct amount of water for mixing, ensuring confidence in peptide administration.
To calculate dosage, you input the desired dose (mcg or mg), the total peptide amount in the vial, and the reconstitution volume. PepCalc then instantly provides the result in both mL and insulin syringe units.