Comparison

Weight Diary vs Weight Trekker

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

Head to head
About

Weight Diary

Track your weight loss progress with daily logs and clear trend lines. Visualize your journey with powerful graphs, set custom goals, and estimate your time to reach them. Integrates with Apple Health and Withings scales for comprehensive tracking.

Highlights
  • Daily weight logging
  • Clear trend line visualization
  • Custom start dates for goals
  • Goal and calorie calculators
  • Apple Health & Withings sync
  • Body fat % and notes
  • BMI display
Read full description

Understand your weight trends over time. Weight Diary helps you cut through daily fluctuations with a clear trend line, so you can quickly see whether you’re moving toward your goal. Log your weight each day to track your progress, estimate your rate of weight loss, and see how long it may take to reach your target. Starting a new diet or routine? Choose a custom start date to measure progress from any point that matters to you. With powerful graphs, goal planning tools, Apple Health support, and Withings scale sync, Weight Diary gives you a simple and effective way to stay on track. Main Features: • See your weight, progress, and goal remaining at a glance • Choose a custom start date for a new diet or milestone • Follow your daily weights with a clear trend line • Switch between the graph, summary, or full weight log with a single tap • Explore your progress over months or years in the full-screen graph • Record body fat % and add custom notes • Plan ahead with goal and calorie calculators • View your BMI with a clear visual display • Comprehensive unit support for pounds, kilograms, and stones • Sync with Apple Health and Withings scales • Full data backup, import, and export

About

Weight Trekker

This app helps users track and predict weight changes while using specific weight loss medications. It offers personalized insights into weight loss trajectories, potential side effects, and drug concentration levels, all within a user-friendly interface.

Highlights
  • Track weight from starting to goal weight
  • Monitor GI side effects and patient-reported outcomes
  • Personalized weight loss predictions
  • Visualize drug concentration levels
  • Compare progress with community data
  • Customizable notes and metrics
Read full description

WEIGHT TREKKER Built by drug experts, Weight Trekker is the most advanced app to track and predict your weight changes with Zepbound®, Mounjaro®, Wegovy®, or Ozempic®. Use our advanced, science-based, models to better understand your personal weight loss trajectory, side effects risks, and drug concentration levels. You can also compare your progress - all in one simple, free app. Key Benefits & Features: BUILT FOR REAL LIFE • Track your progress from Starting Weight → Goal Weight. • Monitor 4 key GI side effects and 3 Patient-Reported Outcomes (PROs). • Enter your data in under a minute each week - effortless and intuitive. ADVANCED INSIGHTS • Get personalized weight loss predictions powered by our advanced, science-based, prediction model. • Visualize how semaglutide or tirzepatide levels increase with repeated and higher dosing. • Understand your side-effect trends via our state-of-the-art graphics, predictions and summaries. JOIN THE WEIGHT TREKKER COMMUNITY • Everyone tracks the same way, so you can see how your results align with real-world data from other GLP-1 users. • Weight Changes - See how your weight loss journey compares to other GLP-1 users in the Weight Trekker community. • GI Side Effects - What GI side effects are most common among GLP-1 users? Are they rated as Mild, Moderate or Severe? How do they change over time? • Patient Reported Outcomes - Are other GLP-1 users rating their Weight Loss, Tolerability and Overall Satisfaction like you? Excellent? Poor? CUSTOMIZE TO YOUR PERSONAL REQUIREMENTS • Add optional notes and metrics like injection site, fatigue, calories, protein, and water intake. • Fully customizable dose levels. • Personalize your Table & Graph views for clearer insights. CHECK OUT OUR LATEST 5 STAR REVIEWS! • “Great Analytics and Graphs. Excited to see an app with predictive modeling being developed. Data entry is user friendly. Seeing the progression of the dosage concentration is helpful. As I entered portions of my data and played around with my data set, the app accurately predicted the progression of my weight loss.” GLP1_SavesLives: 01/03/2025 • “Invaluable. This is a great app which helps with identifying trends and increases motivation! Love it!” Yamit55: 01/23/2025 DOWNLOAD TODAY! Download today and join a community of Weight Trekker members looking to track and scientifically predict their weight loss journey with Zepbound®, Mounjaro®, Wegovy®, or Ozempic®. PHYSICAL HARM DISCLAIMER The information and data provided by this app are intended for personal weight, GI side effects and PRO tracking purposes. While our app offers predictions based on your data, these predictions are not a substitute for professional medical advice, diagnosis, or treatment. Always consult with a qualified healthcare professional before making any decisions related to your health or weight management. PRIVACY We value and respect your privacy. You can delete your account at any time via the “Delete Account” button in the Settings menu. This will completely delete all your data from our database. Privacy Policy: https://weighttrekker.com/privacy/ Terms of Use: https://weighttrekker.com/terms/

Screenshots

Weight Diary4 screens
Weight Trekker4 screens

Verdict

The call

The clearest difference is price: Weight Trekker at Free against Weight Diary's $7.99. Weight Trekker also leads on update cadence (every 3 weeks vs every 6 months) and iOS requirement (17.6 vs 26.0). Weight Diary's advantage is rating (4.9 vs 4.3) and ratings volume (2.6K vs 28). 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

CostPrice · In-app purchases · Ads · Monetization

Weight Trekker is free to download; Weight Diary costs $7.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Weight Diary holds the better App Store score, 4.9 against 4.3. That said, the two scores are not equally well evidenced: Weight Diary has 2.6K ratings behind it against 28, so its average is the more settled of the two. Written reviews point the same way: 97% of Weight Diary's written reviews are positive against 83% of Weight Trekker's.

UpkeepUpdate frequency

Weight Diary ships an update every 6 months, Weight Trekker every 3 weeks. The most recent releases landed on November 10, 2026 and October 30, 2026 respectively.

Scorecard8 real differences · 3 level
Weight Diary versus Weight Trekker: the parameters behind the verdict, then further details
ParameterWeight DiaryWeight Trekker
Price$7.99Free — better
Rating4.9 (2.6K ratings) — better4.3 (28 ratings)
Positive reviews96.8% of reviews — better83.3% of reviews
Number of ratings2.6K — better28
Update frequencyEvery 6 monthsEvery 3 weeks — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaidFree — better
Best chart rank#98 — better—
DevicesiPhone, iPadiPhone, iPad
Requires iOS26.017.6 — better
Further details — not scored
Size11 MB17 MB
Age rating4+12+
DeveloperCURLYBRACE APPS LTDAlan Maloney

Customer experience

Weight Diary

All ratings2,637 ratings
Positive98.2%
Neutral1.1%
Negative0.7%
Written reviews995 reviews
Positive96.8%
Neutral1.5%
Negative1.7%

Weight Trekker

All ratings22 ratings
Positive86.4%
Neutral4.5%
Negative9.1%
Written reviews30 reviews
Positive83.3%
Neutral6.7%
Negative10.0%

Bugs and requests

Weight Diary

Not enough reviews yet to summarise bugs or requests.

Weight Trekker

Reported bugs

3 issues
  • 🐛 Won't let me save data
  • 🐛 Data running off the background
  • 🐛 Cannot add custom dose

Requested features

14 requests
  • Extend DCR to 52 weeks or longer
  • Improve main progress graph
  • Add color and inspiration to the UI
  • Allow editing of dosage day
  • Add waist, hips, and chest measurements
Show 9 more
  • Connect to Apple Health
  • Allow more personalized dose amounts
  • Start the week with weight on shot day
  • Add Black British ethnicity option
  • View predictor data for shorter durations
  • Add protein and water intake tracking
  • Add other body measurements for tracking
  • Add injection site tracking
  • Add fatigue tracking

In-app purchases

None

Weight Diary

No in-app purchases

None

Weight Trekker

No in-app purchases

Questions

Is Weight Diary free?
Weight Diary costs $7.99, with no in-app purchases.
Is Weight Trekker free?
Weight Trekker is free to download, with no in-app purchases.
Which has better reviews, Weight Diary or Weight Trekker?
Weight Diary is rated higher. Weight Diary averages 4.9 out of 5 from 2.6K ratings, while Weight Trekker averages 4.3 from 28 ratings.
Do Weight Diary or Weight Trekker have ads?
Neither Weight Diary nor Weight Trekker shows ads.
Which is updated more often, Weight Diary or Weight Trekker?
Weight Diary ships an update every 6 months, and Weight Trekker every 3 weeks. Most recently, Weight Diary was updated on November 10, 2026 and Weight Trekker on October 30, 2026.

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