Slow down. You've got a day job.

Plans to stop you overtraining

You're trying hard. That's the problem. Most amateur runners go medium-hard on everything — never truly recover, never truly push, and wonder why they don't improve. Zonna prescribes the zone for each session and holds you to it.

Download on the App Store

Two weeks, full access. Then £7.99/month or £59.99/year — or you walk. We won't email you to come back.

Works with Apple Health. Apple Watch supported.

The problem

Every run ends up in the same grey middle.

Easy days
Run a bit too hard. Recover a bit too little.
Hard days
Already tired. Effort gets diluted.
The result
Months of training. No real adaptation.
The product

Three things, done with restraint.

A plan that fits you

Rule-engine generated from your race, fitness, age, and weekly volume — not a one-size template. Pace bands and HR zones derived from your inputs, not guessed.

In-the-moment coaching

Each session knows what it's for and tells you exactly that. Bit keen on an easy day? You'll see it in the post-run line, not buried in a chart.

Nothing you don't need

One job per screen. The plan shows up, you run, the plan adjusts. No noise, no dashboards, nothing competing for the run itself.

Today · Easy run
Easy run — Zone 2
8 km · 55 min
< 145 bpm
6:30–7:00 /km
Keep HR below your zone 2 ceiling — walk if needed.
After your run
How hard?
Kept it under control. That's the session.
Kit · this week
HR on Tuesday's easy run drifted 8 bpm above ceiling. Wednesday looked the same. Two easy days in a row above Z2 is the pattern we're trying to break.
Hold Zone 2 on Thursday. Even if it feels too slow.
Personalised, not generic

Your plan starts from four answers.

Race, fitness, age, weekly volume. Pace bands and HR zones are derived from those — not lifted from a template.

Your answers
How far?Half marathon
GoalSub-2:00
Weekly volume20–40 km
Age38
→ Generates
Today · Easy run
Easy run — Zone 2
8 km · 55 min
< 145 bpm
6:30–7:00 /km
Keep HR below your zone 2 ceiling — walk if needed.
The restraint

What's not in the app.

What we left out, on purpose.

No streaks.
No leaderboards.
No "crushing it" notifications.
No motivational quotes.
No 30-day challenges.
No social feed.
No virtual coaches in your DMs.
No paywalled VO₂ score.
No badges.
No fire emojis. Ever.
Honestly

Probably not for you if…

  • You train six days a week and have a sponsor.
  • You genuinely believe sleep is for the weak.
  • You want your phone to applaud you.

Plenty of excellent apps will. This one won't.

You can't outrun your easy days.