Round
after
round.

The boxing app that times your rounds and keeps every session. On iPhone and Apple Watch.1

Download on the App Store Get notified at launch

Coming soon to the App Store

RNDS home screen, in French: 16 rounds left for the weekly goal, a 3-day streak and the Start a Session button.

Real screenshot, October 6, 20264

The timer running: round 1 of 9, 5 seconds left, red dial with 60 ticks.

The timer

A big number you can read from the bag, and beeps that cut through your music.

12 × 3min

Pro

3 × 2min

Amateur

6 × 3min

Bag session

1–15rounds

Custom

  • Beeps and voice

    The timer sounds at the start and end of every round, and warns you ten seconds before the end.

  • Rhythm mode

    During the round, a voice calls out the combos and the screen shows the defense to work on.

  • Your music keeps playing

    Apple Music or your podcast doesn’t stop. The volume can dip for a beep.

  • Lock screen

    The round stays on screen in a Live Activity and in the Dynamic Island.

Programs

Each program runs three to six weeks, with one focus for each session. A session counts as done once you’ve finished three quarters of its rounds.

Recreational01

Shadow foundations

Guard, footwork, jab, cross and slips, shadowboxing before you hit the bag.

4 weeks, 3 sessions a week

Amateur02

Bag: power

5 to 8 three-minute rounds on the bag, with body work and an all-out finish to every round.

4 weeks, 3 sessions a week

All levels03

Cardio boxing

Rhythm mode at a fast tempo, with short rounds and short rests.

3 weeks, 3 sessions a week

Competitor04

Fight camp

Shadowboxing, bag work and rhythm mode in rotation, up to 12 three-minute rounds.

6 weeks, 3 sessions a week

Remote coaching

Coach

Your coach sends you sessions as links: fight training, strength, running or a meal plan. Open the link and the session is added to RNDS.

  • Get your sessionsthrough Messages, AirDrop or any messaging app
  • Send your weekly reportwith a note if you like
  • Coaching others?send sessions to your boxers and follow their work
Coach screen, in French: My coach, I coach, and the weekly report to send.

Roadwork

Run

GPS tracks your distance, pace and route. The app also has interval sessions, track sessions and heart rate zone runs.

  • Running rounds

    6 × 3 min at threshold, 1 min recovery, like a fight.

    Intervals

  • 30/30

    10 × 30 s all out, 30 s recovery.

    Intervals

  • VO2max 10 × 400 m

    One lap each time, 90 s recovery. The app logs your time and pace for every 400.

    Track

  • Pyramid

    1, 2, 3, 2, then 1 min at threshold, 1 min recovery.

    Intervals

  • Threshold

    3 × 8 min in zone 4, 2 min recovery.

    Zone 4

  • Endurance

    40 easy minutes to build your aerobic base.

    Zone 2

At every kilometer, a beep, then a voice reads out your distance and time.

Around your training

Prep

Sleep, meals, water and weight, in the same place as your sessions.

Prep screen, in French: current program, coach, sleep, nutrition and water, weight.
The Prep screenYour current program, your coach, last night’s sleep, your meals and your weight.
Sleep screen, in French: 9 h 46 last night, well recovered, green light for an intense session.
SleepYour sleep, read from Health or logged by hand, and a tip for today’s session.3
The last seven nights against an 8-hour goal, and naps with an alarm. French interface.
Nights and napsYour last seven nights against your goal, and an alarm for naps.
Nutrition screen, in French: today’s calories and macros, hydration, photo of a meal.
Meals and waterTake a photo of your plate: your iPhone estimates the calories and macros, and the photo never leaves your phone.2

For weight, pick your weight class (16, from strawweight to cruiserweight) and your weigh-in date, then track your weight all the way to fight night.

Journal

Every session is logged and sorted by week and by type. Add your training partners and challenge each other.

Journal screen, in French: sessions, rounds and time this month, rounds per week, breakdown by type.
JournalYour rounds this week against your goal, and your totals for the month.
Challenges screen, in French: 5 days out of 7 at 40%, 100 rounds in 7 days, 10 km prep.
ChallengesChallenges like 5 days out of 7 or 100 rounds in 7 days, solo or head-to-head with your gym partners.
Badges screen, in French: 5 badges out of 32, first round in bronze, round and streak milestones.
Badges32 badges to earn by training, from your first round to your thousandth.

Apple Watch
and Health

  • Apple Watch

    The watch tracks the session you start on your iPhone and measures your heart rate and calories.1

  • Health

    Sessions, sleep, meals, water and weight are saved to Health, if you allow it.

  • Heart rate strap

    A Bluetooth strap sends your heart rate straight to your iPhone.

  • Live Activities

    Runs and sleep also show on the Lock Screen and in the Dynamic Island.

  • Siri

    Start a session or a run with your voice.

  • Control Center

    A control to start a session without opening the app.

Privacy

Your journal stays on your iPhone.

Only what the social features need goes online, and you decide what that is: a hidden session never leaves your phone. There are no ads and no ad trackers, in the app or on this site.

30 days

of sessions visible online, at most

24 h

to review a report

Read the privacy policy

A word from Marc

I box in Lyon, and I built RNDS for my own training first.

If something bugs you during a session, write to me. I read every message.

MarcLyon, October 2026

Changelog

  1. New icon: a white R on black, on iPhone and Apple Watch.
  2. Sleep: a full year of sleep, month by month.
  3. Challenges rebuilt: featured challenge, duels, gym leaderboard.
  4. Run: six track sessions and a custom track.
  5. Heart rate analysis for boxing, jump rope and strength, round by round.
  6. Story editor: templates, background, caption, 1080 × 1920 export.
  7. Full code review ahead of version 1.0.
  8. Social goes online: profiles, follows, feed, likes and comments.

Version 1.0 in the works

RNDS app icon

Coming soon
to the App Store.

RNDS launches soon on iPhone and Apple Watch. Send us an email and we’ll let you know on launch day.

Download on the App Store Get notified at launch

or write directly to contact@rnds.app

Do I need to create an account?

Yes, in 30 seconds: your email (you get a 6-digit code, no password) or “Continue with Apple.” That’s how you get your account back if you change iPhones.

Does RNDS work without an Apple Watch?

Yes, everything works with just your iPhone. To see your heart rate during a session, you need an Apple Watch or a Bluetooth heart rate strap.

Does the timer keep beeping with the screen locked?

Yes. Beeps and voice keep going when the screen is locked, and the round stays on screen in a Live Activity.

Where is my data?

Your journal stays on your iPhone and in Health. Only what the social features need is online. It’s all explained in the privacy policy.

How do I delete my account?

In the app: Settings › Data › Delete my account. Your online data is erased along with it.

All questions