Achieve your peak health with Nox.

Nox AI reads your training, food and sleep, plans your weeks, and checks every lift, meal and night.

Try Nox

Example goals: Bench 225 lb, Down to 180 lb, Run a 5K, Squat 315 lb, Sleep 7 h a night. For each, Nox AI picks the three things to track from your Apple Health data.

Goal
Strength

3

a week steady

Endurance

7,557

steps up 18%

Mobility

2

a week steady

Nutrition

2,731

kcal steady

Recovery

6h 37m

a night steady

Vitals

186.1

lb steady

How it works

  1. Step 1 of 3

    Connect and get your scorecard

    Nox reads your workouts, steps, sleep, weight and meals from Apple Health or Health Connect, then grades your last 30 days across six areas, in plain words.

    1. Strength
    2. Cardio
    3. Activity
    4. Sleep
    5. Diet
    6. Body

    Your raw health records stay on your phone. ·

  2. Step 2 of 3

    Get a plan

    Pick a goal. Nox works out the three things that move it most, and puts a date on your plan.

  3. Step 3 of 3

    Track your progress on the plan

    Every lift, meal and night you log counts. The chart shows how far you have come, and where your pace lands.

    1Every logged single goes on the line.

    2Your pace runs on to where it meets the goal.

    3That point is your date: around 30 Nov, two weeks early.

Then, every day

Log your lifts and meals as you go. Nox reads each entry and tells you where the day stands.

  • Tick each set as you finish it.
  • Beat last week and Nox marks the set as a PR.
  • Sets and volume add up while you train.

Example day for Alex: 2,700 kcal and 160 g of protein a day.

What Nox notices

Nox reads your lifts, steps, sleep and water, then tells you what it sees.

1 of 4 · Your six areas

Nox AI: Sleep is the one to work on: 6h 37m a night, short of 7 hours. Steps are climbing, and the other four areas hold steady.

Example: Alex's data.

Compete with friends

Invite friends to one of your targets. Each of you gets your own number, and the leaderboard ranks you on how often you hit it. Track Record puts your lifts side by side, week by week.

Example group.

Track Record

Maya has not lost a session since August. You're one behind her, and the closest anyone has come.

RankingsMet / Missed
1Maya63d31 / 0

Streaks

1
Oct
2
Oct
3
Oct
4
Oct
5
Oct
6
Oct
7
Oct
8
Oct
9
Oct
10
Oct
2You21d26 / 1
3Jordan28d25 / 2
4Tyler14d25 / 2
5Emily35d24 / 3
6Megan21d23 / 4
7Daniel7d22 / 5
8Chris7d20 / 7

Deadlines are midnight in each member's own timezone.

Share Leaderboard

From people using Nox

“I’ve been motivated to work out regularly, and even pushed myself on some days to finish my steps!! Would recommend the app to anyone looking to form a habit.”
Gurleen136App Store, India · Jan 2026
“Extremely motivational app that makes me want to follow my goals even if I am not up for it. Very smooth and the AI is very effective in giving workable suggestions with respect to your goals”
Siddharth IyerGoogle Play, India · Jan 2026

Questions

Which phones and watches does it work with?

Nox is on iPhone and Android. It reads Apple Health on iPhone and Health Connect on Android, so if your watch, ring, scale or another app saves there, Nox can read it. You choose which kinds of data it sees. No watch? Health sync is optional, and you can log lifts and meals in the app.

I log in Hevy or Strong. Do I have to switch?

No. If Hevy or Strong saves your workouts to Apple Health or Health Connect, Nox reads them like any other workout. To bring your past sessions over, export a CSV from either app and send it to Nox AI in a chat.

What goals can I set?

Goals with a number on them: lose fat, put on size, lift a heavier top set, run a faster time or a new distance, sleep more or move more. You can work toward several at once.

How does Nox work out my goal date?

From fixed rates in published research, worked out in code rather than by the AI. Fat loss is paced at 0.5 to 1% of your body weight a week. For a lift or a run, you pick the timeframe and Nox sets a number you can reach by then (for lifts, based on how long you've been training). As you log, Nox projects when you'll land from your last four weeks and shows whether you're ahead or behind.

How is this different from asking ChatGPT?

Nox AI coaches from your own numbers: your goals and plan, every lift and meal you log, and the health data you let it read. It remembers what you've told it from one chat to the next and tracks your plan every day.

What does Nox do with my health data?

The raw records Nox reads from Apple Health or Health Connect stay on your phone. Nox sends its servers summaries, like one line per workout, daily totals and each night of sleep, and Nox AI (which runs on OpenAI) uses them to coach you. Nox never sells your health data or uses it for ads. You can delete your account in Settings, and Nox erases your data from its servers within 48 hours. Privacy policy

What if I skip a day?

If a target is a set number of days a week, a skipped day counts as rest as long as you can still hit the week. If the target is daily, or the week can no longer be hit, the day counts as missed and Nox reminds you. If you keep stalling on a target, or keep beating it, Nox can rework it.

Can I train with friends?

Yes. Invite friends to one of your targets. Each of you gets your own number, and you share a leaderboard ranked on how often you hit it. Only the people in it see that leaderboard, and there's no public one.

Is it free?

Nox is free to download and start. Pro is a subscription with a free trial when you subscribe. You see the price in the app before you pay, and you can cancel any time from your App Store or Google Play subscriptions.

Give your goal a date.

Free to start on iPhone and Android.