SwimDelta
Feel your pace. Never look.
Free · Designed for iPhone. Not verified for macOS.
Hold your target pace on autopilot. Your watch taps your wrist only when you slow down — no more breaking stroke to check your splits mid-set.
Endurance swimmers know the problem: on a long 400, a 1000, or a continuous 4K, the only way to know whether you're on pace is to break your stroke and squint at your wrist. SwimDelta fixes that with one simple contract:
Silence means you're on pace.
Set your target — per 50, 100, or 200 metres — and swim. Every time you complete that distance, SwimDelta checks your split:
- On or ahead of target → nothing happens. Green screen if you glance.
- Behind target → one firm tap on your wrist, and a red screen showing exactly how many seconds that split lost.
The delta resets every split, so you know the moment a fade starts — and the moment you've pulled it back.
NOTHING TO PRESS
Start the swim and put your wrist in the water. Sets close and reopen on their own as you stop and push off. Water Lock is on from the first length to the last. Everything you need mid-swim is on one screen: how far off pace your last split was, total distance, elapsed time, current pace, heart rate, and the time of day so you can leave on the clock.
To finish, unlock the crown and swipe — the same gesture as Apple's own Workout app.
BUILT FOR REAL SETS
- 25 m, 50 m and 25 yd pools
- Choose whether you're judged every 50, 100 or 200 m
- Set your own tolerance — you decide how many seconds count as slow
- Mixed sessions work: a set that ends short of your measured distance is still scored, pro-rata against the same target
- Every swim saves to Apple Health, closes your rings, and appears in Fitness with heart rate and stroke data
YOUR RESULTS, ON YOUR PHONE
The iPhone app is the logbook. Every session with set-by-set breakdowns, a split-by-split green/red grid, rest times between sets, and pace trends across weeks. Nothing to manage during the swim — the watch is fully self-sufficient.
YOUR DATA STAYS YOURS
Everything lives in Apple Health on your own devices. No account, no cloud, no ads, no tracking, no analytics. Nothing to sign up for.
Requires an Apple Watch running watchOS 10 or later with swim tracking, and an iPhone running iOS 17 or later. Apple Watch Ultra gives the strongest haptics through water.
Built by an endurance swimmer who got tired of losing his rhythm at every wall.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
The developer, Alejandro Odreman, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Alejandro Odreman
- Size
- 1.4 MB
- Category
- Health & Fitness
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 17.0 or later. - Mac
Requires macOS 14.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later. - Apple Watch
Requires watchOS 10.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- Copyright
- © 2026 Alejandro Odreman