Comparison

Soft Challenge 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

Soft Challenge

This app guides users in building healthy habits through a customizable daily routine. It offers recommended rules for fitness, diet, hydration, and reading, allowing users to adapt the duration and tasks to their personal goals and lifestyle.

Highlights
  • Customizable habit rules
  • Personalized goals and lifestyle adaptation
  • Recommended daily workout routine
  • Healthy diet tracking
  • Hydration goals
  • Reading habit tracking
Features
Read full description

The Soft Challenge has its own recommended set of rules and guidelines that are all about creating healthy habits at a steady daily pace.  The Soft Challenge is completely configurable to your personal goals and lifestyle, you can modify the tasks and or the duration as needed! The recommended rules for The Soft Challenge are as follows: - One 45-minute workout per day, with one day for active recovery every week. - Eat a Healthy Diet, of your choosing - Only Drink Alcohol socially, if any at all - Drink 3 liters of water per day - Read 10 pages of any book

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

Soft Challenge4 screens
75 Sustainable4 screens

Verdict

The call

The clearest difference is price: 75 Sustainable at Free against Soft Challenge's $1.99. On update cadence, 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

75 Sustainable is free to download; Soft Challenge costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Soft Challenge ships an update fortnightly, 75 Sustainable every 2 weeks. The most recent releases landed on October 30, 2026 and October 16, 2026 respectively.

Scorecard1 real difference · 9 level
Soft Challenge versus 75 Sustainable: the parameters behind the verdict, then further details
ParameterSoft Challenge75 Sustainable
Price$1.99Free — better
Rating4.8 (286 ratings) — better—
Positive reviews64.0% of reviews—
Number of ratings286 — better—
Update frequencyFortnightlyEvery 2 weeks — better
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhoneiPhone
Requires iOS16.4 — better17.0
Further details — not scored
Size60 MB1 MB
Age rating4+4+
DeveloperWhite Belt Development LLCcalbo, LLC

Bugs and requests

Soft Challenge

Reported bugs

6 issues
  • App stuck on Day 1 congratulation screen
  • Water consumption not saving
  • App won't allow moving forward without checking all tasks
  • Cannot save changes to weight units
  • App stuck on 'great job keep on crushing it' screen
Show 1 more
  • Cannot go back and fix missed tasks

Requested features

4 requests
  • Allow users to share progress with others
  • Option to edit/disable certain features
  • Photo option for tracking
  • Extend the number of days for challenges

75 Sustainable

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

Soft Challenge

No in-app purchases

None

75 Sustainable

No in-app purchases

Questions

Is Soft Challenge free?
Soft Challenge costs $1.99, with no in-app purchases.
Is 75 Sustainable free?
75 Sustainable is free to download, with no in-app purchases.
Do Soft Challenge or 75 Sustainable have ads?
Neither Soft Challenge nor 75 Sustainable shows ads.
Which is updated more often, Soft Challenge or 75 Sustainable?
Soft Challenge ships an update fortnightly, and 75 Sustainable every 2 weeks. Most recently, Soft Challenge was updated on October 30, 2026 and 75 Sustainable on October 16, 2026.

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