Zolt is an adaptive body coach to help you lose fat, build muscle, and maintain healthy habits.
Zolt helps you reach your goal body with intelligent, personalized coaching. Whether you're cutting, bulking, or maintaining, Zolt adapts to your body every day using your own data and not just static formulas. We use an adaptive TDEE algorithm (also known as dynamic TDEE or dynamic expenditure) to help make sure you always are on track to reach your weight goals.
Start with your goal. Zolt handles the rest: tracking, adapting, and coaching you toward it.
Adaptive TDEE & Macros That Evolve With Your Body
- Zolt’s adaptive TDEE algorithm recalculates your daily calorie needs based on real-time changes in your weight, workouts, metabolism, and recovery. No more guesswork, just adaptive calorie targets that shift as your body does.
- Your macro goals also adjust based on your progress, protein preferences, and dietary focus. Everything is personalized, yet effortless.
Personalized Calorie Goals for Every Phase
- Zolt supports your current phase — cutting, bulking, or maintaining — and evolves with you over time. Weekly and daily check-ins help you stay consistent while your nutrition plan flexes as your weight, training, and goals shift.
- Zolt doesn't just set targets, it guides you through every plateau, push, or reset.
Smart Food Logging with Barcode, AI, and Recipes
- Log meals with speed using AI-powered food search, barcode scanning, and custom recipe creation. Track full macros and micros, not just calories, and set flexible RDA goals based on your preferences.
- Zolt turns food tracking into a seamless, personalized experience that supports your goal — not one more chore to manage.
Activity Goals That Adjust to Your Energy & Training Load
- No one-size-fits-all goals here. Zolt creates daily movement targets that respond to your actual recovery, energy, and recent workouts. Whether it’s a normal day, a recovery day, or a performance push, your goals adapt accordingly.
- Cardio load metrics like TSB, ATL, and CTL help guide intensity over time. You train smarter, not harder.
Recovery and Sleep Insights from Apple Watch Data
- Zolt pulls from your Apple Watch to deliver real recovery insights — not just pretty graphs. Your sleep, HRV, resting heart rate, and SpO₂ are translated into recovery scores and readiness ratings.
- You’ll get actionable tips to improve sleep quality and reduce stress, and a habit journal to help identify what’s boosting or breaking your recovery.
Health Journeys and Habit Goals That Align With Your Big Picture
- Zolt lets you go beyond weight to build your ideal lifestyle. Group goals into “Journeys” like longevity, performance, or energy and track habits like steps, cardio, sleep, hydration, and more.
Zolt is more than a health tracker. It's a body coach that evolves with you.
Smarter guidance. Clearer goals. Better results.
Powered by fatsecret nutrition API (https://www.fatsecret.com)
Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula
Privacy Policy: https://zolthealth.com/privacy-policy
Been using the free tier for a few months and then later switched to the premium tier.The free tier is awesome providing a highly accurate TDEE and syncing with Apple Health Data from any food diary app you use. If all you want to do is lose weight, you don’t even really need the premium tier, which is awesome. I ended up upgrading to the premium tier because the recovery stats and sleep functionality are awesome. I also wanted the food logging to be easier with the app itself. The predicted energy is also very reliable provided your weight data and food data is accurate. The library of food is not the biggest but frankly that’s where you can use free food diary apps to log what you eat and sync that with your health app.The premium tier also has an awesome chart showing you the history of your TdEE and predicted energy and especially the difference between your dietary energy and the predicted energy used. This app makes a lot of useful insights as long as you are honest and upfront about what you eat. And recognizing those insights is the first step to help you realize you can actually make changes that you understand and that you can see are making improvements.
Last update fixed some lag but broke adaptive TDEE, TDEE history, and nutrition sync.
cannotberead
Last update fixed some minor lag but unfortunately completely BROKE TDEE. My entire TDEE History chart is now blank and it’s miscalculating my TDEE by 1000s with the Zolt adjustment also heavily inflated. It seems the issue is it’s no longer registering any entries for weight or food logs since it’s suddenly saying there’s not enough history - shows 0 entries entered for this week and last - despite the fact that there are logs for all the days going back a year. And I’ve tried syncing to force a correction in all the ways possible - pulling down, syncing option in TDEE section - except nutrition sync in setting section because that’s broken too. Every attempt made is quick to say sync failed. I really don’t understand why every update is worse than the last. I’m beginning to wonder if any thorough test runs are done prior to these updates being submitted. Bummer because this was a good app when I first subscribed to it. And I can’t even export my nutrition data to go elsewhere because it only lets you export weight history, and clearly nutrition data was not syncing to the supposed server anyway since the sync is broken.
Developer Response
Hi! I'm sorry you ran into this issue. This issue affected a small subset of users with the last update and it should be fixed now as soon as you update to the newest version.Again, really sorry - feel free to email me at hi@zolthealth.com too!
The app I’ve wanted for a long time!
JhoyJr
Zolt is fantastic and in my opinion, the best fitness app out there! I enjoy lifting weights and tracking my macros… but the challenge I’ve had until getting ZOLT is always having to guess my current TDEE so I can eat the right amount to hit my goals. ZOLT gives me that info and so much more!! It accurately projects my maintenance calories on any given day (at any point in the day) and lets me track my food/macros, and even shows me other helpful metrics like scoring my current sleep and recovery habits. I love this thing! I’m grateful for ZOLT and the countless hours that went into crafting it. Like the name implies— ZOLT definitely gives me a boost of encouragement to stay on track and have fun doing it too.
Data nerd’s dream come true
༼ つ ◕_◕ ༽つ ♥
Simply put, this app tracks so many variables and creates near real time analyses on how those variables impact things like your TDEE, sleep, recovery, energy levels, etc. Easily worth the money.I haven’t used the in app AI for food tracking yet, but I use a separate AI to help me meal plan and track all my intake, then provide me end of day totals in nutritional label format which I use Zolt’s nutrition label scanning feature to input it as one meal at the end of the day.UI is not always intuitive but workable. Instructions are sparse and it can be buggy sometimes but the developer is *extremely* responsive and seems genuinely enthusiastic about integrating fixes and adding more features.
Bug fixes and improvements.
Version 2.7
The developer, Zolt Labs LLC, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Used to Track You
The following data may be used to track you across apps and websites owned by other companies:
Identifiers
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
Identifiers
Diagnostics
Privacy practices may vary, for example, based on the features you use or your age. Learn More
The developer indicated that this app supports the following accessibility features. Learn More
Supported Features
Dark Interface
Differentiate Without Color Alone
Sufficient Contrast
Reduced Motion
Information
Seller
Zolt Labs LLC
Size
204 MB
Category
Health & Fitness
Compatibility
Requires iOS 16.4 or later.
iPhone Requires iOS 16.4 or later.
iPad Requires iPadOS 16.4 or later.
Mac Requires macOS 12.0 or later and a Mac with Apple M1 chip or later.
