So good
Response from developer
Thank you, this is exactly what we hoped to build: no guesswork, just train and trust it. I hope you enjoy every Zone 2 mile. Best, Rod.
Apple Watch Series 3
I have been hearing about Zone 2 triangle for some time and want to integrate that into my training program
I found the app last night and it seems to be perfect I downloaded it, set it up on my iPhone but it’s not on the Apple Watch.. now I know my series 3 is a bit old but I would assume it would work…
I tied to get help using the AI tool in the app and it does not work for helping with the app..
I searched in line and there’s little to now help.
I did find a posthaste app will not work on a series 3..
It seems to be more effort than it’s worth.. apps do not need to be this complicated.. it should be like any other app.. download set up then use..
I purchased the lifetime subscription for something it seems will not work.
Response from developer
Hi Bill, thank you for the review, and for wanting to build the Zone 2 base. Helping people like you is why the app exists. Let me clear up the watch part, because the core of what you bought does work for you. The Zone2AI watch app needs a newer watchOS than the Series 3 can run, so it will not appear on that watch. That is a real limit of the older hardware, not something setup can fix. But you do not need our watch app to get your Zone 2 heart range and build your habit. Record your run or walk with the built-in Apple Workout app on your Series 3, then open Zone2AI on your iPhone. It reads that workout from Apple Health and gives you your time in Zone 2, the triangle, all of it. The in-app coach answers training questions, so for setup it is faster to email me directly at support@zone2ai.com and I will get you going personally. Best, Rod, Founder of Zone2AI
Many noticable glitches
Response from developer
Hi Amazinace, and thank you. This feedback makes the app better. I appreciate you taking the time to write it out. You flagged three real things, and I want to own each. A freeze during a sprint session is on us; the heaviest moment is right as an intense workout finishes and syncs in, and I want to find exactly where it is catching for you. You are also right that the Norwegian 4x4 is not as clear or as easy to start as it should be. We built that protocol carefully and have not yet brought it into every part of the experience, and making it obvious is on my to-do list. Finally, a coaching insight that reads as if you have not trained almost always means your latest session didn't sync on time, which we have been steadily fixing and clearly have not fully solved. I read every message myself. Tell me which watch you train with and I will get to the bottom of all three with you. Please email me at support@zone2ai.com. I want to earn those stars back. Best, Rod, Founder of Zone2AI
Has a lot of potential
Response from developer
Hi Tim, thank you for the feedback, and for rooting for us. Love to hear that you like the core concept and the live Zone 2 indicator. You're right that workout tracking has had some bugs on some Garmin watches, but we've recently shipped a string of updates aimed at fixing exactly this. I'd love to get your specific setup tracking perfectly. Could you email me directly at support@zone2ai.com? I read every message and will work with you personally to get your data logging accurately every single time. I want to earn those extra stars! Best, Rod
Where is the free trial?
Response from developer
Hi Richie, i understand that you do not want to pay blindly for something you haven't tried, and i respect that. We don't have a traditional free trial right now, but we do have a low-cost weekly option ($2) specifically so you can test the full app without a major commitment. If it's not for you, you can easily request a refund through Apple. I built this to be a tool you genuinely value, which is why we also offer a one-time Lifetime license so you can just own it forever with no recurring billing. If you're open to giving it another look, I'd love the chance to win you over. Please reach out to me directly at support@zone2ai.com. Best, Rod, Founder Zone2Ai
Limitations
Response from developer
Hi Itsmeyuli, Thank you for taking the time to write this. You highlighted some real points of friction, and I want to help clear them up. On your Zone 2 range extending into tempo pace. The app has a built-in way to adjust this using the RPE prompt at the end of your sessions: after each workout, you can mark Too Easy, Just Right, or Too Hard. The system combines your physiology with your lived workout experience: every Too Hard you submit lowers the range. If your sessions feel like they are extending into tempo pace, marking Too Hard for the next few will automatically pull the range back down to where it belongs. On seeing all your run histories: You can find these in the Week tab on the home screen, which shows every workout the app reads, not just the Zone-qualified ones. Zone 2 sessions appear at the top, sprints in their own row, and everything else lands under "Other Workouts" further down. That is the best place to verify your runs are being seen by the app. Those that qualify show up as Zone 2 or Sprints, and the rest are still safely recorded there. On Apple Watch Workouts not counting as Zone 2 even when your heart rate sits in the range. Our detection on HealthKit-imported workouts is stricter than it should be, which is a real limitation we are working to improve. Today, the cleanest way to get precise Zone 2 tracking is to use the Zone2AI watch app directly on your Apple Watch, which runs the calculation live in your personalized range and surfaces the credit immediately. It would be great if you reach out at support@zone2ai.com so I can look at your numbers and help calibrate sooner. I would love it if you try Zone2AI's watch app on your next run, give honest RPE feedback at the end, and let me know how it feels. Best, Rod Zone2AI
I want to like this app
I believe they are going to figure it out. Rod has been very responsive via email.
Response from developer
Hi Conrad, thank you for writing this. The 59-min ruck that didn't save and the "resume from earlier time" prompt both trace to a Garmin pause/resume bug we shipped a fix for on May 4 (Connect IQ v1.3.3.7). Three users hit it the same week, and your case helped us prioritize the bug fix. We've processed your refund given your troubles. Once you've tried the new version, I'd be grateful if you'd take another look at the rating. Either way, the refund stands. Best, Rod
Great app to increase your performance
Response from developer
Thanks Luisjo, hearing that you've built up aerobic endurance over a month is the exact signal that makes this worth doing. Keep showing up and the zone gets wider. Appreciate you sharing.
Older version was better
Response from developer
Hi Drewjames, thank you for being a long-time user. I appreciate you sticking with us through the transition to v2.0. We hear your feedback about the app "seeing all workouts as runs." In the next update, if you record a non-cardio workout (like Strength Training or Yoga), the app will no longer assume it's a Zone 2 attempt. It will simply ask: 'Was this a Zone 2 session?' If you say 'No', it just logs it quietly without the confusing analysis screen. We are also building a "Minimalist Mode" to bring back the clean, simple experience you loved from v1, tailored to zone 2 enthusiasts. Thanks for the honest feedback. it helps us make the app better. Ro & the Zone2ai Team
Great insights
Response from developer
Thank you very much Brian! Glad the insights are helping you in your journey. That's exactly our goal: help people build the habit that leads to a long and high-quality life. Best of luck, and happy 2026!
Love this
Aggravating
Response from developer
I hear you. Your experience sounds incredibly frustrating, and I’m sorry it happened. You’re right: no one should ever have to pay twice just to log back in. Please go ahead and request a refund through Apple, and we’ll make sure it’s approved as soon as possible. Zone2AI is currently geared toward Zone 2 enthusiasts who want a precise tool to guide them to their ideal heart-rate range. But we’re evolving fast: our goal is to make it a tool that helps anyone build a sustainable Zone 2 habit for life, no matter where they’re starting from. We’re also adding real-time feedback and smoother progress tracking so users can see value even before they're able to hit the 45-minute threshold. As a trainer with 25 years of experience, your feedback is gold. We'd love to connect directly at support@zone2ai.com if you’re open to sharing more. Thanks again for calling this out. It helps us improve. Rod & the Zone2AI team
Can’t contact developer
I’m comparing this app’s zone 2 calculation (128-141bpm) to the Maffetone Method based on my age and being relatively untrained (180 - 49 - 5 = 126 max).
If anything, I’ve read that the MAF calculations typically result in a _higher_ heart rate than most Zone 2 calculations, so I’m curious, how is this app determining the Zone 2 range?
My other issues have to do with the difficulty in meeting the 45 minute threshold, noise from heart rate monitoring, and lack of customization - but I’ve read the other reviews and appreciate the developer’s responsiveness on these points.
I can recommend this app with some reservations, and I’m looking forward to the updates.
Too literal
My main complaint is that if you do a 50-55 minute steady state workout with an average HR in the dead center of your zone 2 range, it likely won’t count as it usually takes a few minutes at the beginning to ramp up to your target range and if there is any noise in your HR data (common with wrist mounted monitors like Apple Watch, garmin, etc) you won’t end up with the minimum 45 minutes in range that it requires. Also, if there is a way to customize the Zone 2 HR range, I couldn’t find it.
Response from developer
Thanks for the feedback. We hear you. Zone2AI uses a rigorous definition of Zone 2 because the research (including from Dr. Peter Attia) shows that you need at least 45 continuous minutes in your true Zone 2 to unlock the full mitochondrial and metabolic benefits. Were not strict for the sake of it; we do it to helping you hit the threshold that matters for long-term health and performance. We understand your frustration. Especially when ramp-up time makes it hard to get credit for the work you’re doing. We're actively working on ways to make the experience more friendly while staying true to the science. We invite you to try our Zone2AI Apple Watch companion app, which shows you in real time how many minutes you've logged in valid Zone 2. That way, there's no guesswork, and you’ll know exactly when you’ve hit that 45-minute mark. Our next release will include the ability to customize the HR range, and guidance on incorporating Zone 5 / VO2 max sessions, which help you unlock the full benefits of the aerobic training "pyramid" Thanks again for your support and for being part of this early journey. We're building Zone2AI to be the simplest, smartest way to train for health and longevity. Your feedback helps us get there.
Not Attia’s Zone 2
Response from developer
Thanks for the thoughtful review, and for sharing your lab-measured lactate threshold data (the holy grail of zone 2 data). That level of precision shows you're serious about getting Z2 right, and we respect that. You're absolutely correct: while the app currently calculates your range using age, max HR, and 30-day resting HR average, it doesn’t yet allow users to manually input a lab-tested LT1 (lactate threshold). That’s a feature we agree is important for more advanced users, and it’s on our roadmap. We recommend trying our Apple Watch companion app, which makes it easier to stay aware of your live Zone 2 minutes during a workout. And we’ll keep you posted as we build out the ability to fully personalize ranges, including by setting your own lactate threshold. Thanks for using Zone2AI and helping us improve. this kind of feedback pushes us forward. best, Rod & Zone2Ai team
