Comparison

Undiet vs Weight Loss Navigator

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

Head to head
About

Undiet

Features
Read full description

Undiet is a private tracker for your weight journey and a community of people walking the same road. Log how your day went, keep progress photos in a vault that never leaves your phone, mark which diet or treatment you are on, and see what actually works for you. NEW IN UNDIET 2.0 Undiet has been rebuilt from the ground up. If you used the original Undiet with an email account, sign in with the same email and your history comes along. The photo tracker is back, now with a locked vault and side by side compare, joined by a diet catalog, a community and a calmer way to log your day. YOUR PHOTOS STAY ON YOUR PHONE Progress photos are stored only on this device, behind Face ID or your passcode. They are never uploaded, never shared and never used to train anything. Not even we can see them. Line up front and side photos from any two dates and watch the change. EFFORT, NOT CALORIES No food database, no barcode scanning, no counting. Each day you log your weight and how much effort the day took, in a couple of taps. Over weeks the graph shows the trend, and the streak rewards showing up, never the number on the scale. ONE TIMELINE, ANY DIET Pick what you are on from a catalog of eating patterns and treatments: Mediterranean, keto, low carb, intermittent fasting, calorie counting, vegetarian, high protein, GLP-1 therapy (semaglutide, tirzepatide, liraglutide) and dozens more, or simply no diet, just tracking. Switch any time. Your journey becomes a timeline of periods with the weight curve over all of them, so you can see what worked for you and what happened after you stopped. GLP-1 DIARY On medication? Record doses, appetite and how you feel through titration, therapy and the maintenance phase afterwards. It is a diary, not a dosing guide: always follow your doctor. PEOPLE ON THE SAME ROAD Your journey is private. The Community is a separate space under a nickname: share a check in, ask a question anonymously, send a word of support. Supportive reactions only, no downvotes, and photos can never be posted. Report and block are one tap away and every post is moderated. YOUR DATA IS YOURS • Progress photos never leave the device • Nickname only in the community, no real names • No ads, no data selling, no tracking across apps • Export everything or delete your account in two taps, from inside the app UNDIET PLUS Tracking, the catalog and the community are free. Undiet Plus unlocks unlimited photo history, your full weight trend over all time and the stats for every diet period. Auto renewing subscription: EUR 6.99 per month or EUR 39.99 per year with a 7 day free trial on the yearly plan (prices may vary by country). Payment is charged to your Apple ID at confirmation of purchase or when the trial ends. It renews automatically unless cancelled at least 24 hours before the end of the current period. Manage or cancel it in your App Store account settings. Undiet does not give medical or dietary advice and is not a substitute for your doctor. The catalog describes diets and treatments neutrally so you can record what you are on. Undiet is for people aged 16 and over. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Terms: https://undiet.krnic.be/terms Privacy Policy: https://undiet.krnic.be/privacy

About

Weight Loss Navigator

Features
Read full description

Finally — a simple, no-fluff app for losing weight. Weight Loss Navigator makes your journey clear, effective, and easy to stick with. No confusing food databases. No barcode scanners. Just the numbers that matter. No more overwhelming food lists or complicated calculations. Enter what you eat, log your workouts, and move on with your day. Our built-in TDEE calculator shows exactly how many calories your body needs, and your daily dashboard tracks progress in real time. Key Features: • Instant TDEE (Total Daily Energy Expenditure) calculation • Quick and easy food entry • Simple workout tracking • Real-time progress updates • Clean, clutter-free interface • Focused daily calorie goals Weight Loss Navigator strips away the noise and helps you focus on what really matters: calories in vs. calories out. Start your weight loss journey today with a tool that just works. By using Weight Loss Navigator app, you agree to our Terms of Use (https://weightlossnavigator.com/terms) and Privacy Policy (https://weightlossnavigator.com/terms). Disclaimer: Weight Loss Navigator does not provide medical advice. This app is for informational purposes only. Consult your physician before starting any diet, weight loss, or fitness program.

Screenshots

Undiet4 screens
Weight Loss Navigator4 screens

Verdict

The call

Undiet and Weight Loss Navigator are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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

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

Both are free to download. Undiet sells 2 in-app purchases, starting at $5.99 per month and Weight Loss Navigator sells 2 in-app purchases, starting at $7.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Undiet ships an update weekly, Weight Loss Navigator every 6 days. The most recent releases landed on November 3, 2026 and October 30, 2026 respectively.

ScorecardNo meaningful differences
Undiet versus Weight Loss Navigator: the parameters behind the verdict, then further details
ParameterUndietWeight Loss Navigator
PriceFreeFree
Update frequencyWeeklyEvery 6 days — better
AdsNoNo
In-app purchasesYesYes
DevicesiPhone, iPodiPhone, iPod
Requires iOS15.114.0 — better
Further details — not scored
Size43 MB44 MB
Age rating17+4+
DeveloperKrnicSimplify It Labs

In-app purchases

2 purchases

Undiet

Subscriptions2
  • Undiet Plus Monthly$5.991 Month
  • Undiet Plus Yearly7 Days trial$34.991 Year
2 purchases

Weight Loss Navigator

Subscriptions2
  • Weight Loss Pro (Monthly)$7.991 Month
  • Weight Loss Pro (Yearly)$49.991 Year

Questions

Is Undiet free?
Undiet is free to download, with in-app purchases available.
Is Weight Loss Navigator free?
Weight Loss Navigator is free to download, with in-app purchases available.
Do Undiet or Weight Loss Navigator have ads?
Neither Undiet nor Weight Loss Navigator shows ads.
Which is updated more often, Undiet or Weight Loss Navigator?
Undiet ships an update weekly, and Weight Loss Navigator every 6 days. Most recently, Undiet was updated on November 3, 2026 and Weight Loss Navigator on October 30, 2026.

Other comparisons