Head-to-head
Tortoise vs Couch to 5K: a finish-friendly 5K plan
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Head-to-head
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Couch to 5K that lets you actually finish.
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The official free NHS running plan that guides absolute beginners from walking to running 5K over about nine weeks.
Pricing: Free
Key differences at a glance

Tortoise
All Things AIChoose pace plan
Tortoise/standard/hare → 12/9/6-week schedule
Today's workout
Walk/run intervals with voice cues
Heart-rate gate
Repeat last week if HR was above ceiling
Treadmill mode
Time-based intervals when GPS is unavailable
Couch to 5K
CompetitorCompletely free with no in-app purchases or subscription
Proven 9-week, three-runs-a-week walk-run structure built by the NHS in collaboration with the BBC
Audio coaching from real people, with a choice of expert and celebrity trainers to guide each session
Available on both iOS and Android, with a graduation experience and Beyond Couch to 5K follow-on plan
Pricing: Free