a GLP-1 tracker for everything else, too.

Log your doses, weight, food, and how you feel in one place, and see how your week fits together.

Download on the App Store See what it does
The Today screen: a check-in, the week’s weigh-ins at 163.8 lb, 2.2 lb down on the week and 9.8 lb to the goal, day 2 of the dose week, and 1,110 of 1,800 calories so far.
The Reports screen: the latest weekly report, 3 lb lighter than last week, and the ways into week by week, a typical dose week, and the food log.

Spoken check-insPlus

Log everything, just by talking

Tell Sato how your day went, in your own words. It picks out your weight, your dose, your meals, how you feel, and any exercise, and you look it over before anything’s saved.

  1. 1Tap Check in
  2. 2Talk about your day
  3. 3Sato fills in the entries
  4. 4Check them and save

A spoken check-in: tap Check in and say how the day went, and Sato writes out what you said and picks out eight entries: a weight of 163.4 pounds, a 7.5 milligram dose of tirzepatide in the left thigh, a chicken salad for lunch, mild nausea, hunger at 2, quiet food noise, a 30 minute walk, and a good mood. Saving them files each one under Weight, Dose, Food, Side effects, Check-in, and Exercise.

Weight

See where your weight is heading

Type in your weight, or let Apple Health add it for you. The graph shows how far you’ve come, how you compare with the clinical trials, and where you’re heading on your current dose.

Show it as a smooth, straight, or trend line, and add as much or as little detail as you like. When you reach your goal, the chart changes to show the range you’re holding, week by week.

Every detailWeigh-ins, both overlays, six stats

The weight graph as a smooth line over logged weigh-ins, with the progress bar, dose periods along the bottom, the study range, the projected range, and six stats.

Doses

Every dose, right on schedule

When you log a dose, your dose and your next injection site are already filled in. Sato keeps your schedule and shows your estimated medication level between doses.

Each dose you log comes out of the vial or pen you used. Sato counts what’s left, tells you when you’ll run out, and reminds you on the morning you should reorder.

Next dose: Tirzepatide 7.5 mg on day 2 of 7, due Sat, Oct 17 at 1:00 PM, last dose Sat, Oct 10, rotate to the left thigh. Estimated level: 8.9 mg now, next peak Oct 13.

Food

Your food log, in the same app

Search for a food, repeat a meal you have often, or scan a barcode. Choose the nutrients you care about and set a target for each.

PlusLog it from a photo

Take a photo of your meal or its nutrition label, and Sato fills in the calories and nutrients for you.

Today’s logCalories, nutrients, water, steps

Side effects

Side effects, lined up with your doses

Log nausea, changes in appetite, and other side effects as they happen. Sato lines them up with your doses, so you can see which days after a dose tend to be harder.

Symptoms and appetite over 14 days against the dose curve.

Weekly reportsPlus

How your week went

At the end of each dose week, you get a short report on your weight, symptoms, and food. Past reports stay saved, so you can look back at any week.

Latest report for Sep 29 to Oct 5: 3 lb lighter than last week, a new low at 162.8 lb, symptoms on 4 days, and food noise louder than the week before. Under it, this week so far, on day 2 of 7.

Clinician summary

Bring it all to your next visit

Sato turns what you’ve logged into a PDF of your weight, doses, symptoms, and food, with the questions you want to ask. Print it, or send it before your appointment.

Sample page one of a clinician summary for Abby, marked not real patient data: Tirzepatide once weekly since Mar 15, 2026; weight 163.8 lb, down 25.2 lb (13.3%), BMI 26.4, 7.5 mg held 22 weeks, 31 of 31 doses taken, next dose Oct 17; one item for review; the weight trend from 188.8 to 163.8 lb against the 2.5, 5 and 7.5 mg dose stages and the published-trial range; and five symptoms by day of the dose week.
The large Today widget: Good morning, Abby, with a Check in button, then 163.8 lb, 2.2 lb down on the week over seven day tiles, 25.2 lb down so far with 9.8 to go, and the dose, 7.5 mg, building on day 2 of 7.
The water widget: 48 of 80 oz, with a button to add a glass.
Sato on Apple Watch: tirzepatide 7.5 mg, the estimated level, day 2 of 7 and the next dose.

Widgets and Apple Watch

Your week on your Home Screen and your wrist

Keep your weight, your dose week, and today’s food and water on your Home Screen and Lock Screen, and add a glass of water without opening the app.

On Apple Watch, see your dose week and log your weight. With Sato Plus, you can also speak a check-in there to review on your iPhone.

The food widget: 1,110 of 1,800 calories, with 74 g of protein and 20 g of fiber. The check-in widget in dark mode: Good morning, day 2 of 7 of the dose week, with a Check in button.
The weight widget in dark mode: 163.8 lb, 2.2 lb down on the week over seven day tiles, and the bar from 189 to the 154 goal.
The weight page on Apple Watch: 163.8 lb, the change on the week, the seven day tiles and the bar to the goal.
The dose widget in dark mode: 7.5 mg, building on day 2 of 7, next dose Friday at 8:00 AM.

Free to track. Add Plus when you want more.

Sato

Free on your phone, for as long as you use it.

  • Doses, injection sites, and estimated levels
  • Weight, a forecast, and how you compare with clinical trials
  • Check-ins, side effects, hunger, and mood
  • Food log with search, barcodes, and nutrient targets
  • Calendar, progress photos, and the clinician PDF
  • iCloud sync, Apple Health, Apple Watch, and widgets
$0
Download free

Sato Plus

Everything in Sato, plus these four.

  • Spoken check-insLog meals, doses, weight, and how you feel just by talking.
  • Weekly and dose reportsA report every week, patterns across your dose week, and those patterns in your clinician PDF.
  • Photo meal loggingCalories and nutrients from a photo of your meal or its nutrition label.
  • Five more themesOat, Apricot, Sage, Tide, and Dusk, in light and dark.
YearlySave 64%
$29.99a year

Just $2.50 a month, billed once a year

Monthly
$6.99a month

Paid monthly, a year of Plus comes to $83.88. Paid yearly, it’s $29.99, so you save $53.89.

Explore Sato Plus

U.S. prices; the App Store shows your local price before you buy. If your subscription ends, you keep free tracking and everything you’ve logged; Plus reports and their archive need an active subscription. Compare all features and billing details.

Your health data stays yours

On your phone

What you log is stored on your device and can sync with your private iCloud. Online features send what they need to our service providers. You don’t need a Sato account.

Know what goes online

Spoken check-ins, food photos and label scans, the weekly note, online food search, and optional help with imports send data online. Sato asks before anything goes to OpenAI, and each feature has its own switch. See the data and controls.

No ads, no selling

Sato is paid for by Sato Plus subscriptions and optional tips, and nothing else. Your data is never sold or used for advertising.

Start with Sato today

Free on the App Store for iPhone, with widgets and Apple Watch. Add Sato Plus whenever you want more.

Download on the App Store