Every Couch to 5K app runs on the same skeleton — 9 weeks, 3 sessions a week, run/walk intervals that get longer as you go. What actually differs between apps is how they deliver those cues to your ears while you're out the door and not looking at a screen.
Couch to 5K (C25K) is a specific, well-documented progression: you start at roughly a minute of running followed by a minute and a half of walking, repeated for about 20 minutes, and by week 9 you're running a continuous 5K. This structure was popularised by the NHS in the UK and by similar programmes elsewhere, and it's public, not proprietary — any app claiming to do "Couch to 5K" is following the same underlying weeks.
See the full 9-week plan on one page or the week-by-week breakdown for exactly what each week asks of you.
| App type | How it delivers the plan | Best for |
|---|---|---|
| NHS Couch to 5K app | Real presenter voiceovers, straightforward timer cues, free | Wanting the official, no-frills version |
| Generic interval-timer apps | Beeps/tones marking run vs. walk, minimal voice | People who just want a stopwatch that knows the plan |
| Exhale Exhale | Same interval structure, but the run segments are triggered inside an audio-drama mission — an earpiece "handler" reacts to your pace in real time instead of a beep | People who find a bare timer boring and drop off by week 3 |
The honest failure point for most Couch to 5K attempts isn't the running — it's staying motivated through weeks 2 to 4, the stretch where the walk breaks shrink and it stops feeling easy. An app that only tells you "run now, walk now" gives you nothing to hold onto during that dip. Wrapping the same physiological interval plan inside a story — where "run now" is instead "you've spotted the contact, move" — doesn't change the training, but it changes whether you show up for week 4.
This is general information, not medical advice. If you have a health condition, are pregnant, or haven't exercised in a long time, check with your GP first. Stop if you feel chest pain, dizziness or unusual breathlessness. Last updated 27 October 2026.