How Doubles works
Doubles is an iPhone app for people who work out and want to lose body fat, recomp or stay lean. Here's the whole thing: your plan, the two numbers, a normal day of logging, eating out, your partner and how you see progress.
Your always-on get-lean partner
With doubles, you build your own get-lean AI partner. Think of a friend who's done it before, knows the ropes and tells you the truth. It lives in your phone, knows your numbers and never gets tired of your questions.
Build your plan
Built on the boring science that works: a steady calorie deficit and plenty of protein. No banned foods, no detox, no weird tricks.
How it works
Your whole day comes down to two numbers. Land within 5% of your calories, hit your protein minimum, and you're golden.
Calories
Anywhere within 5% of your target is a bullseye, and the check mark shows up. Over one day? That's one day. No starving to make up for it.
Protein
Go over if you want. Protein keeps your muscle while the fat comes off, so you look leaner, not just smaller.
Activity
Workouts, daily steps and Saturday pickleball sync automatically from Apple Health, or log anything yourself. Staying active is part of getting lean, so your partner watches your baseline. Keep your routine as it is, or ask what you could add.
Logging
Talk, type or snap a photo. Here's a normal day.
Morning. 2,000 to work with today and 180 g of protein to find.
2,060 cal. 183 g protein.
Zero food scales.
Eating out
Tell your partner where you are. Get options that fit what's left of your day, before you order.
Restaurants, takeout, drinks, the bread basket question. Covered.
Estimates use the restaurant's published nutrition info when it has some. Close is good enough, and you can edit any number.
Make it yours
Give it a name, a personality and a look. The voice changes. Your plan doesn't.
Otto, Coach, Gerald, Big Steve. Your call.
Warm, hype, dry or savage.
Pick its colors, its eyes and how it moves.
The tough ones roast your choices, never your body.
You ask
Turkey sandwich and an iced latte.Logs anything you say, snap or type.
Can I still do brunch Sunday?Straight answers, using your numbers.
What should I eat for more protein?Coaching when you're stuck.
Compare my progress photos.Puts this week next to week one.
It checks in
Morning. 2,000 to work with today. Protein first.
A daily plan, in two lines.Five days in the zone this week. Same plan.
A weekly review: what's working and what to change.Protein's been short at breakfast. Want three quick fixes?
A nudge when something's off.Progress
Your partner watches your trend, never a single weigh-in, and shows you the bigger picture. On pace? It says so. Something off? It suggests a fix that works with your life.
Trends pulls from Apple Health and your smart scale, so you see more than weight. Go as deep as you like, or never open it.
Example plan and numbers shown. Yours are built from your own.
Progress photos
Snap a progress photo every week or two. They stay private, and your partner can put this week next to week one, so you see what the scale can't.
Lifts and trips
"Bench 185 for 8." Your partner keeps your best set for each lift and tells you when it goes up, so you can see your strength holding while the fat comes off. Progress shows up to five of your key lifts.
Tell your partner the dates ("cruise Nov 14 to 20"). On the trip you just log, with no targets and no streaks to protect. When you're home, the plan picks back up.
doubles is for active people who want to look leaner, without a food scale, a meal plan or a 5 a.m. routine.
Not a diet. Not a workout app. doubles will never cheer you on for eating less.
Everything's included. Cancel any time and keep your history.
About $5.83 a month
Cancel any time
Prices in US dollars. Your subscription renews until you cancel in your Apple Account settings. If you cancel, your history stays readable and you can export it.
Nope. Say it, snap it or tap one of your usuals. Close is good enough, and you can fix any number.
No. Nothing's banned. You get two numbers to hit and a partner who helps you hit them.
The suggested pace is about half a percent of your body weight a week. That's roughly a pound a week at 180 lb. You can pick slower or faster when you build your plan.
If you're active and want to look leaner, yes. doubles handles the food side. It doesn't plan your workouts, but it does count them.
Any time. Rename it, switch its personality or change its look. Your plan stays exactly the same.
No. A watch makes steps and workouts automatic through Apple Health, but everything works from your iPhone.
Cancel any time in your Apple Account settings. Your history is still yours to read and export.
It's stored on your phone and synced to your account. Food photos, voice notes and messages go through our server to AI providers to estimate food and write replies. We never sell your data or use it for ads.
Not yet. iPhone in the US for now.
Cut or recomp, protein, tracking with ChatGPT, alcohol and more: see all questions.