Zolt is an adaptive body composition coach. You choose whether you want to lose, gain, or maintain weight. Zolt uses the nutrition and weight data you provide to keep your calorie and protein targets connected to that goal.
You do not need an Apple Watch to use the adaptive coaching system. Connected health data, Coach, and iMessage make parts of the experience easier, but nutrition, weight, and a clear goal are the foundation.
The three parts of Zolt
| Part | What it does | What it needs from you |
|---|---|---|
| Adaptive TDEE | Maintains a working estimate of your daily energy needs | Consistent nutrition logs and weigh-ins |
| Targets | Turns your current estimate and goal into calorie and protein guidance | A direction, rate, and preferences |
| Coach | Helps you log, understand changes, and work through decisions | A clear question or request |
These parts share the same context. If your current data suggests that your energy needs have changed, Zolt can update the plan without asking you to start over with another calculator.
What happens when you begin
Zolt starts with an initial estimate because it has not seen enough of your data yet. That number is a starting point, not a conclusion.
As you log food and weigh in, Zolt can rely more on your own history. The app shows whether your current estimate is still developing, updating normally, or waiting for better data. You do not need to know the internal calculation to act on those states. The status tells you what information is missing and whether your current target is being held.
Read How Zolt learns your TDEE for the user-facing behavior and What makes a TDEE estimate reliable for the habits that improve it.
What Zolt needs from you
Zolt needs a consistent record, not a perfect one.
- Log most of what you eat instead of alternating between meticulous days and blank days.
- Weigh in regularly enough for Zolt to distinguish a trend from normal daily fluctuation.
- Mark incomplete days correctly rather than leaving them ambiguous.
- Update your goal when your intended direction or rate changes.
If recent data is not reliable enough, Zolt holds the current estimate instead of reacting to a weak signal. Why your TDEE is not updating walks through the checks that matter.
What Zolt does not require
Zolt does not require a watch, chest strap, or smart scale. It can use connected sources when they are available, but wearable calorie estimates do not replace the nutrition and weight relationship at the center of the plan.
It also does not require every meal to be perfect. Consistency matters because Zolt needs to compare like with like over time. A pattern that changes from careful weekdays to missing weekends is harder to interpret than a steady logging style.
Start in this order
- Choose lose, gain, or maintain.
- Set up your first goal.
- Connect nutrition and weight data.
- Log food in Zolt.
The TDEE calculator can give you a starting estimate before Zolt has enough personal data to adapt it.
Give Zolt a consistent record
Log meals and weigh in regularly. Zolt will tell you when it has enough recent information to update your plan.
Start logging with Zolt