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Tre testi su come portare avanti una sfida di 90 giorni in modo onesto: cosa conta come fallimento, in cosa cambiano davvero i formati più noti e quali app fanno il loro lavoro. Scritti per esserti utili anche se Snurko non lo installi mai.
90-day challenge restart rules — what counts as failing
The restart rule stated plainly, and a ruling for every edge case people actually argue about: partial habits, forgotten logs, sick days, travel, time zones and the day that ends at 00:30.
75 Hard vs 75 Soft vs your own 90 days
What each format actually asks of you, where the rules came from, what dietitians and physiologists have said about the strict end of the scale, and why the format matters less than whether you argue with it.
Best 75 Hard and 90-day challenge apps — an honest comparison
What each app actually costs, which platforms it runs on, what its store rating really says and what reviewers complain about — checked against live store listings on 8 August 2026, with a link for every claim.