Splits: Running Decoded
Sebastian Olsen Health & Fitness iPhoneiPadiPod touch
Splits: Running Decoded is a free Health & Fitness app for iPhone and iPad by Sebastian Olsen. Requires iOS 26.4. Updated July 25, 2026.
- Price
- Free
- on the App Store
- Size
- 16 MB
- Age 12+
- Updated
- Jul 25
- 2026 · v1.0.2
Screenshots
About Splits: Running Decoded
Every run is read automatically - easy, tempo, intervals, long, race - and cross-referenced with your heart rate, VO₂max, sleep and the weather, so you see what your training is doing to your body, not just what you did. No account. No server. All analysis runs on your iPhone from your Apple Health and Apple Watch data. WHAT SPLITS READS FROM YOUR RUNS • Automatic run classification - every run typed from its heart-rate shape and pacing, honestly, with a confidence level you can audit • Proof of fitness - the same pace costing your heart fewer beats per minute than it did months ago, measured, not vibes • Heart rate zones built from your own recorded maximums, not a formula guess • Your response curve - which training actually moves your VO₂max, resting heart rate and HRV in the weeks that follow, tested across response windows from 2 to 12 weeks • Heat sensitivity - your personal pace cost per degree, from watch-recorded conditions • Smooth pace, effort and elevation charts with detail you can pan through on long runs • Your journey - milestones, achievements and personal records across your entire history SHARE THE RUNS WORTH SHARING Turn photos taken mid-run into share cards with your route and stats overlaid - story-ready in two taps. PRIVATE BY DESIGN Your runs never leave your phone. Splits has no account system, no cloud, no ads and no tracking. It reads Apple Health with your permission and does every calculation on-device. FREE AND PRO Your latest run is always free, fully analysed. Splits Pro unlocks your full history, journey, achievements and the deep analysis - with a 7-day free trial on the monthly plan. Cancel anytime in Settings. Splits works with running workouts recorded by Apple Watch or any app that saves runs to Apple Health. The more history you have, the more it can tell you - your first import reads years of runs in minutes. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Splits requires Apple Health and works best with Apple Watch or a compatible run tracker. Splits provides data-driven insights, not medical advice. Consult a healthcare professional for medical concerns.
What’s new
Version 1.0.2 · Updated July 25, 2026
Splits 1.0.2 - Sharper eyes The classifier got smarter, and it re-reads your entire history the first time you open this version. No re-sync needed. Here's what it now sees: • Hard runs that don't pace evenly - city stops, hills, gates, dogs - used to sneak into "easy". Not anymore. If you spent most of a run in Zone 4-5, Splits calls it what it was, and tells you why. • Tiny recordings (the accidental 400m when you forgot to stop your watch) no longer earn confident labels. They're marked for what they are: too short to read. • A tracker left running through a two-hour walk is no longer your "longest run of the year". Long runs now have to actually be runs. Because run types feed everything else - your training balance, your runner type, your stimulus-and-response links - expect those to get more honest too. If your "% easy" number shifts after this update, that's not a bug. That's the point. Also in this version: • A better first-run experience: if Splits can't find any runs in Apple Health, it now says so clearly and helps you fix access, instead of showing you an empty app. • More resilient Apple Health reading - transient hiccups now retry instead of looking like missing data. • Clearer trial info: exactly what's free, for how long, and that nothing is charged today. Splits still runs entirely on your phone. No account, no server, no data leaving your device. Found something misclassified? Tell it - corrections are always yours to make.
App privacy
The developer, Sebastian Olsen, reported these privacy practices to Apple.
Data Not Linked to You
The following data, which may be collected but is not linked to your identity, may be used for the following purposes:
- Usage Data: Advertising Data, Product Interaction
- Purchases: Purchase History
- Identifiers: User ID
Used for: Developer’s Advertising or Marketing, Analytics, App Functionality
Alternatives to Splits: Running Decoded
Looking for apps like Splits: Running Decoded? Here are 6 similar apps on the App Store. The highest rated is Runmo: AI Running Coach (5.0/5), and all 6 are free to download.
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Steps – Step Counter
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Running Goals
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Runmo: AI Running Coach
5.0
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Pace It: Running Performance
4.0
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This & That
3.6
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RunScene: The Running App
| App | Rating | Price | Last updated | Compare |
|---|---|---|---|---|
| Splits: Running Decoded | – | Free | July 25, 2026 | |
| Steps – Step Counter | – | Free | Jul 21, 2026 | Compare |
| Running Goals | – | Free | Jun 6, 2024 | Compare |
| Runmo: AI Running Coach | 5.0 / 5 (1) | Free | Oct 10, 2026 | Compare |
| Pace It: Running Performance | 4.0 / 5 (4) | Free | Oct 21, 2026 | Compare |
| This & That | 3.6 / 5 (9) | Free | Jul 10, 2026 | Compare |
| RunScene: The Running App | – | Free | Oct 14, 2026 | Compare |