Comparison

Fit75 vs 75 Sustainable

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

Head to head
About

Fit75

This AI-powered fitness coach offers personalized workouts, instant meal tracking via photo, and body composition analysis. It provides 24/7 AI coaching for nutrition and fitness advice, helping users achieve their health goals without needing multiple apps.

Highlights
  • AI coaching and nutrition advice
  • Customizable workouts by duration, intensity, and equipment
  • Instant meal logging with photo analysis
  • Body composition analysis with selfie
  • FitDad Score for fitness ranking
  • Progress tracking charts
Features
Read full description

Fit75 gets you to Day 75 of the challenge to transform your fitness. Every task your challenge asks for, tracked in one place. Log your workout, scan your dinner, tick your water. All you got to do is just show up. YOUR WORKOUT PLAN Don't know where to start working out? Tell Fit75 your goal, your equipment and how many days a week you train. You'll get a full custom plan based on real research from the best personal trainers. Follow the plan and achieve results. SCAN YOUR MEALS Point your camera at your plate. Fit75 reads the food and fills in calories, protein, carbs and fat. Unlike other calorie trackers Fit75 gives you a score for every meal and balances it against your goal. Hit your targets without any synthetic drugs. SIMPLE HABITS, SIMPLE TRACKER Water, steps, reading, progress photos and weight, all in one app. But Fit75 goes further. The app analyzes WHEN you do each task and gives you a score to help you optimize doing each action. This is how tasks turn into ROUTINE. PICK YOUR MODE 75 Easy is a 30 minute workout, 2L of water, clean meals and 10 pages a day. 75 Medium adds 10,000 steps and a longer session. 75 Hard adds a second outdoor workout, set hydration intake and a daily progress photo. IT'S ABOUT SHOWING UP Fit75 isn't like other 75-day challenge trackers or workout trackers. It's not about how many pounds you'll lose. Or how heavy you can lift. Fit75 is about saying you want to get fit -- and then finally doing it. The app is here to help you each day. See real progress every single day. See your trends. Your habits and insights. Just keep showing up and doing better each time. We'll get there!! 24/7 COACHING Other apps need you to screenshot or copy-paste your data to other AI or LLM websites. Fit75 lets you chat directly to an always available coach that's been trained on real research and leaders in the fitness industry. Ask why your lifts aren't progressing. Get meal suggestions. Discuss any trends or improvements you can make to your plan. Worried about privacy? So are we. That's why Fit75 NEVER stores any of your messages remotely. Your messages sent to AI companies are all anonymized and not tied to your account. FIT75 It's time to get fit. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://wu.studio/privacy

About

75 Sustainable

Features
Read full description

A 75-day challenge you can actually finish. Five things a day: the workout, the protein, the calories, the water, and three lines of gratitude. That's the whole app. ONE PAGE PER DAY Open it, tick the workout, type three numbers, write three lines. Every change saves itself — there is no save button to forget. TARGETS, NOT JUST NUMBERS Protein and water fill toward a floor you set. Calories fill toward a ceiling you shouldn't cross (or a floor, if you're bulking — your call). Each band is its own meter: the fill is the progress. THE CARD Seventy-five tiles, fifteen across. Each day's tile fills from the bottom by how many of the five landed. A missed day stays a gap — it does not reset your count. Consistency beats perfection. SUSTAINABLE ON PURPOSE No two-a-days, no starting over on day 41, no progress-photo shame. Set targets you can keep for seventy-five days, then keep them. REMINDERS, YOUR WAY Add as many daily reminders as you like — a morning nudge, a mid-day water check, an evening close-out. Each has its own label and time. SHARE THE CARD One tap renders your card as a clean story-sized image, ready to post. YOURS, FULL STOP Free. No account, no subscription, no ads, no analytics, no servers. Your log is one file on your phone, and you can export or restore it any time. Ounces or millilitres, your pick. Yesterday is editable. The future is not. Day one is whenever you say it is.

Screenshots

Fit754 screens
75 Sustainable4 screens

Verdict

The call

The clearest difference is in-app purchases: 75 Sustainable at none against Fit75's 8. 75 Sustainable also leads on ads (none vs shown) and iOS requirement (17.0 vs 26.0). Fit75's advantage is update cadence (weekly vs every 2 weeks). On price 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

Both are free to download. Fit75 sells 7 in-app purchases, starting at $7.99 per 7 days. 75 Sustainable asks for nothing beyond the download.

UpkeepUpdate frequency

Fit75 ships an update weekly, 75 Sustainable every 2 weeks. The most recent releases landed on October 26, 2026 and October 16, 2026 respectively.

Scorecard4 real differences · 6 level
Fit75 versus 75 Sustainable: the parameters behind the verdict, then further details
ParameterFit7575 Sustainable
PriceFreeFree
Rating4.6 (91 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings91 — better—
Update frequencyWeekly — betterEvery 2 weeks
AdsYesNo — better
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhoneiPhone
Requires iOS26.017.0 — better
Further details — not scored
Size292 MB1 MB
Age rating4+4+
DeveloperWorld United Studios Limitedcalbo, LLC

In-app purchases

7 purchases

Fit75

Subscriptions7
  • Fit75 Unlimited$7.997 Days
  • FitDad Unlimited$14.991 Month
  • FitDad Unlimited$19.991 Month
Show 4 more
  • Fit75 Unlimited3 Days trial$47.991 Year
  • FitDad Unlimited$47.991 Year
  • FitDad Unlimited2 variants$59.991 Year
  • FitDad Unlimited3 Days trial$79.991 Year
None

75 Sustainable

No in-app purchases

Questions

Is Fit75 free?
Fit75 is free to download, with in-app purchases available.
Is 75 Sustainable free?
75 Sustainable is free to download, with no in-app purchases.
Do Fit75 or 75 Sustainable have ads?
Fit75 shows ads; 75 Sustainable does not.
Which is updated more often, Fit75 or 75 Sustainable?
Fit75 ships an update weekly, and 75 Sustainable every 2 weeks. Most recently, Fit75 was updated on October 26, 2026 and 75 Sustainable on October 16, 2026.

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