Comparison

Flux vs Just'a Tabata

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

Head to head
About

Flux

Features
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Flux is the ultimate Mounjaro and Zepbound tracker for your GLP-1 weight loss journey. Log injections, track weight loss, monitor estimated tirzepatide levels, and build daily weigh-in streaks. Smart injection site rotation, AI-powered insights, and full Apple Health sync make Flux the only weight loss companion you need. Injection Tracking & Dose Reminders Log every Mounjaro or Zepbound injection with dosage, site, and frequency. A visual countdown ring shows when your next dose is due, and smart site rotation suggestions recommend the best injection location based on weight loss performance and side effect history at each site. Estimated Tirzepatide Levels A built-in pharmacokinetic model simulates your Mounjaro or Zepbound concentration over time, showing trough, current, and peak tirzepatide levels so you understand how your medication works between doses. Weight Loss Tracking & Weigh-in Streaks Track your weight manually or sync automatically with Apple Health. A weigh-in history grid tracks every day you log your weight over the past year, rewarding daily consistency with a streak counter. See your progress toward your goal weight, view trends with a 7-day moving average, and get projected goal dates based on your current rate of loss. Smooth, colour-coded charts show your weight loss journey across every dosage tier. Share Your Progress Show off your weight loss with a shareable Journey Card designed for social media. See total weight lost, monthly breakdowns, and dosage history in one beautiful graphic. A privacy toggle lets you hide medication details before sharing. Daily Health Dashboard Monitor calories, protein, water intake, steps, and sleep quality pulled from Apple Health in one clear daily view. Celebrate hitting your daily goals with full-screen confetti. Customise your water quick-add buttons to match the bottles and glasses you actually use. AI-Powered Weight Loss Insights Get personalised, encouraging commentary on your Mounjaro or Zepbound progress. Flux uses AI to highlight key trends in your weight loss, medication levels, and overall journey. Toggle individual insights on or off to see only what matters to you. Side Effect Tracking Log and review side effects with dates and notes. Flux identifies patterns between injection sites and side effects to help you make informed choices about site rotation. Charts & Analytics Interactive charts show your weight history colour-coded by dosage tier, injection site distribution, and more across custom time ranges from two weeks to all-time. A stable moving average trend indicator cuts through daily noise to show whether your rate of weight loss is increasing, steady, or slowing. Weight Loss Predictions Set target weights and target dates, then see projected timelines based on your current or overall rate of loss. Supports kilograms, pounds, and stones. Passed targets are automatically cleared so you can focus on what is ahead. Apple Health Integration Flux syncs with Apple Health to read your weight, calorie intake, protein intake, step count, and sleep data. Weight entries logged in Flux are automatically saved back to Apple Health. Your health data stays on your device and is never uploaded to external servers. Import & Export Back up your data as JSON or import from a previous Flux or Shotsy export. Your health data stays in Apple Health where it belongs. Personalised Setup Set your goal weight, daily targets for water, calories, protein and steps, choose your preferred units (kg, lbs, stones), customise your weigh-in grid colour, and configure injection reminders so you never miss a dose. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Disclaimer: Flux is not a medical device and does not provide medical advice, diagnosis, or treatment. Always consult your doctor or healthcare provider before making any medical decisions or changes to your medication.

About

Just'a Tabata

Features
Read full description

An interval timer that gets out of the way. Build a workout in seconds โ€” work, rest, rounds, sets โ€” then start it and let clear beep cues call every change. The whole builder is free, and so is every workout you save. One person, one workout, two screens. Start, pause, skip and end together on iPhone and Apple Watch when both are open โ€” or run them independently, for two people training at once. โ€ข Work / rest / rounds / sets, exactly as you want them โ€ข Beep cues and haptics on every change โ€ข Unlimited saved workouts, plus a Quick Start you shape yourself โ€ข Home Screen widgets โ€ข Progress history, kept on your device Recommended by TiNa Slim โ€” youtube.com/@TiNa_Slim Pro โ€” one payment, no subscription. Removes the ads and keeps the workout running while you're away from the app, with a live countdown on the Lock Screen and in the Dynamic Island. Adds voice countdown, exercise announcements, the full progress insights, and the Apple Watch app. No account. No cloud. Nothing you record leaves your phone.

Screenshots

Flux4 screens
Just'a Tabata4 screens

Verdict

The call

The clearest difference is ads: Flux at none against Just'a Tabata's shown. Just'a Tabata's advantage is update cadence (every 5 days vs every 10 days) and device support (3 vs 1). On price, in-app purchases and iOS requirement there is nothing between them.

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

CostPrice ยท In-app purchases ยท Ads ยท Monetization

Both are free to download. Flux sells 2 in-app purchases, starting at $4.99 per month and Just'a Tabata sells 3 in-app purchases, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Flux ships an update every 10 days, Just'a Tabata every 5 days. Both last shipped on October 25, 2026.

Scorecard3 real differences ยท 3 level
Flux versus Just'a Tabata: the parameters behind the verdict, then further details
ParameterFluxJust'a Tabata
PriceFreeFree
Update frequencyEvery 10 daysEvery 5 days โ€” better
AdsNo โ€” betterYes
In-app purchasesYesYes
DevicesiPhoneiPhone, iPad, Apple Watch โ€” better
Requires iOS26.026.0
Further details โ€” not scored
Size4 MB21 MB
Age rating17+4+
DeveloperRICHARD BAGSHAWVinh Nguyen

In-app purchases

2 purchases

Flux

Subscriptions2
  • Flux Pro Monthly$4.991 Month
  • Flux Pro Yearly7 Days trial$24.991 Year
3 purchases

Just'a Tabata

Subscriptions2
  • Pro Monthly3 Days trial$0.991 Month
  • Pro Yearly7 Days trial$4.991 Year
One-time1
  • Just'a Tabata Pro$0.99

Questions

Is Flux free?
Flux is free to download, with in-app purchases available.
Is Just'a Tabata free?
Just'a Tabata is free to download, with in-app purchases available.
Do Flux or Just'a Tabata have ads?
Just'a Tabata shows ads; Flux does not.
Which is updated more often, Flux or Just'a Tabata?
Flux ships an update every 10 days, and Just'a Tabata every 5 days. Most recently, Flux was updated on October 25, 2026 and Just'a Tabata on October 25, 2026.

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