# Fuelin - Performance Nutrition — user reviews > 280 indexed App Store user reviews of Fuelin by Thrive AI Labs, rated 4.50/5 from 1,213 ratings. - Source: https://appshunter.io/ios/app/fuelin-performance-nutrition/id1579806995/reviews - App overview in markdown: https://appshunter.io/ios/app/fuelin-performance-nutrition/id1579806995.md - Rating breakdown: 5★ 957 · 4★ 101 · 3★ 33 · 2★ 37 · 1★ 85 ## Newest reviews (11 of 280) ### 2/5 — Has Bugs that need fixing *2026-08-24, version 2.2.5* Not the greatest app when it comes to coming up with nutrition for an athlete. I will try it a little longer but likely cancel soon as it needs help. ### 2/5 — Good on paper but annoying *2026-08-13, version 2.2.4* Fuelin is a really good idea, and I think it could be a great product, but the execution is poor. There are several issues with the software that make it difficult to justify paying for it. One of the biggest problems is how inconsistently it handles calories around workouts. For example, you can wake up in the morning and Fuelin tells you that you have 3,800 calories available for the day based on your planned workout. You then complete that workout, and say the workout is supposed to last 1 hour and 30 minutes. If you finish 1 hour and 29 minutes, Fuelin can suddenly drop your daily calorie target from 3,800 to 3,000, a completely unreasonable 800 calorie reduction. If you had simply stayed on the bike for another minute, you would apparently have received the full calorie allowance. There is no meaningful reason why a one minute difference should result in such a dramatic change. This highlights a larger problem with Fuelin: it feels like there is too much reliance on an AI driven system and not enough human judgment. The concept of using AI to personalize nutrition is interesting, but when the system makes decisions that seem this arbitrary, it becomes frustrating rather than helpful. The app also feels like it has very little human care behind it unless you're willing to pay the additional, extremely expensive fee to work with their actual nutrition coaches. The software itself should be providing a level of thoughtful guidance that makes the user feel like someone actually understands the context of their training. At around $100 a year, Fuelin isn't outrageously expensive, but it's still more money than I would personally spend on it in its current state. The idea is genuinely good and I can see what they're trying to accomplish. Unfortunately, the execution just isn't there yet. With better logic, more consistency, and more meaningful human oversight, Fuelin could be a great product. Right now, though, it feels like a promising idea that hasn't been executed particularly well. ### 4/5 — Performance changing *2026-08-12, version 2.2.4* The first week using this app completely changed my performance in competitive gravel cycling. I have always struggled with Under fueling and questioned why I was not able to increase my mileage and performance. Now I am able to push my body further and recover faster with proper nutrition numbers. Also has saved me a lot of time that was wasted trying to think of something to eat or what to buy at the grocery store. Only thing I would ask differently is a change up of recipe recommendations. ### 4/5 — Needs better integration *2026-07-31* I use Garmin Connect with my Garmin watch for tracking everything as well as the Runna app for marathon training. I’m really enjoying the Fuelin app but it is really annoying and frustrating that I have to manually input every planned workout instead of Fuelin pulling that information from either Runna or my Garmin calendar. Runna pushes my planned workouts to Garmin but for some reason Fuelin isn’t able to grab that information. I also use an AI coach called Rest or Train that has all of my info from Runna and Garmin. Fuelin has a great concept but still lots of work to do in the integration department! It also seems glitchy when entering my upcoming runs/workouts. In the beginning I wasn’t able to enter planned mileage but Fuelin was able to fix that problem. Now I’m having trouble getting dates to “stick”. I have to enter the date several times in the process of adding the manual activity or it just reverts back to today’s date. Very annoying. ### 4/5 — Fuelin *2026-07-26* This is a great app but it’s a bit confusing and maybe a tad complicated when you start using it. You have to invest a far bit of time watching all the videos and tutorials ### 2/5 — No free version *2026-07-24, version 2.2.4* I don’t have a problem with this being a premium app, but you should probably explain that at some point before you have people sign up and share their personal information. Seems like a way to just harvest personal information. ### 3/5 — Almost Great *2026-07-21, version 2.2.4* My main hesitation with this app is that my training plan in Final Surge does not sync to Fuelin until after the workout is complete, which then recalculates everything for the rest of the day. I thought that it would sync before in order to fuel properly before and during. It also wasn’t clear the options of AI or working with a human. Maybe this is beginner user error, but it’s not quite what I was expecting. I’ve used several macro apps, and this is basically the same as all the others. It may be a different story in the higher plan that pairs you with a human, but I don’t have the budget for that right now. I guess you get what you pay for! ### 4/5 — It works, getting results, app is improving *2026-07-18, version 2.2.4* Issues with Fuelin: Can’t change sleep and wake times so when my actual workouts upload everything is thrown off. Doesn’t save favorites across different meal types. Often can not process what is journaled and get error messages. Lots of bar codes give errors. The recommended recipes are non specific to the meal macros, few have matched my recommended macros Food journal is improving but takes longer to use compared to programs I’ve used in the past. Only cool feature is the macros adjusted to your workouts. It’s made a huge difference and I’ve had results. ### 3/5 — Need to edit calories of food item *2026-07-01* This app could be pretty close to perfect if it allowed you to edit all the information about food that you log. I can edit the serving size, as well as macros (protein, carbs, fat). But then it does its own calculation for the calories and it’s so far off and wrong from the nutrition label. I should have the ability to adjust the total calories for the food time too. I can do that is literally all the other food tracking apps. ### 3/5 — Für den deutschsprachigen Raum nicht gut geeignet und den sehr hohen Preis definitiv nicht wert *2026-06-25* Im Prinzip eine gute Idee. Was ich mir im Vergleich zu anderen Ernährung Apps erwartet habe ist eine bessere Ernährung. Steuerung zu meinem Training dazu. Das klappt zwar so einigermaßen, aber es gibt sehr viele Dinge, die ich für vollkommen ungeeignet halte: Wenn man das Ganze mit Trainings Peaks synchronisieren will, dann funktioniert es nur ideal, wenn man exakte Uhrzeiten seines geplanten Trainings eingibt. Das kann ich aber nie zu 100 % planen, weil ich ja nie weiß, was mein Tag so hergibt. Die Kohlenhydrat Mengen, während jedes Trainings sind absolut utopisch und auf gar keinen Fall für irgendjemanden erreichbar, wenn ich so viel Süßes Zeug zu mir nehmen würde, könnte ich erstens im Laufe des Tages keine einzige vernünftige Mahlzeit mehr zu mir nehmen, weil dann meine ganze Kohlenhydrat Bedarf alleine mit zu kriegen Zeug während des Trainings gedeckt wäre. Zweitens würde ich mich vermutlich schon nach 1 Stunde übergeben. Die Synchronisierung zu TrainingPeaks ist wahnsinnig umständlich. Man bekommt die ganze Zeit irgendwelche Nachrichten, dennoch muss man sehr oft manuell synchronisieren, um dann eine vernünftigen Vorschlag in der App zu haben. Das eintragen der Mahlzeiten ist mehr als umständlich, die Diktierfunktion funktioniert wirklich schlecht, das Scannen der Produkte mittels QR-Code ergibt vollkommen aber witzige Produktgrößen, die man dann mühsam per Hand korrigieren muss. Sonst hat man einfach komplett falsche Daten in der App erfasst. Es ist völlig offensichtlich, dass diese App in keinster Weise für den deutschsprachigen Raum ausgelegt ist. Die meisten Standard Lebensmittel werden gar nicht erkannt und wenn man sie einmal eingegeben hat, kann man sie auch nicht speichern. am Ende fängt man jeden Tag bei null an. Wenn man die gleiche Mahlzeit einträgt, das ganze kostet unfassbar viel Zeit. Auch fehlt komplett die Funktion einfach ein Foto von seinem Essen zu machen, wenn man beispielsweise auswärts isst. Die Rezeptideen, die man dann bekommt, gemessen an den noch ausstehenden Bedarf Sind wirklich seltsam, da kommen sehr eigenartige Mahlzeiten heraus, die kein Mensch freiwillig zu sich nehmen würde. Für den hohen Preis hatte ich mir deutlich mehr erhofft, auch finde ich es schade, dass man die App nicht erst testen kann, sondern gleich mal so viel Geld ausgeben muss. Zwar wurde beworben, dass es Verbesserungen ergeben hat mit dem letzten Update, ich habe aber keine Verbesserung entdeckt, die mir in irgendeiner Art und Weise hilft. Das Ganze ist umständlich, zeitraubend, und wahnsinnig unpräzise. Gewichtsverlust hat sich bei mir leider noch in keinster Weise ein gestellt, obwohl ich mich akribisch an die Ernährung Ziele gehalten habe. ### 5/5 — Great training addition *2026-06-24, version 2.2.2* I started using this app because I wanted to learn how to eat for the exercising training that I was doing. Not just from a calorie perspective but from a carbohydrate, protein fat, etc.. This app does a great job. It helped me understand what I was putting in and how would affect my exercise sessions. You can enter a big event on the calendar and it will adjust your meals for the training of that event. I have learned a fair amount about what I’m eating and what I should be eating when I want to perform at my best. ## Most critical reviews (10 lowest-rated) ### 1/5 — Interface stops working immediately upon cancellation *2026-08-15* I am still in the middle of a month that was paid for, but was on the fence about continuing a $30/month subscription and pre-emptively cancelled in the middle of the month to avoid getting charged next month when I really hadn’t yet made up my mind about how useful the app was going to be for me. Immediately, the app lost functionality to interface with my Garmin workouts and won’t refresh data. I also hadn’t been in love with challenges using Lose It to log nutrition data and having that interface with Apple Health and then sync with Fuelin via that avenue, because it lead to incorrect macro data showing up in the Fuelin app. If I was on the fence before about continuing the subscription, the abrupt failure of a service that I have paid for for a couple of more weeks to continue working for me had cinched the deal. ### 1/5 — Wouldn't recommend for marathoners *2026-08-09, version 2.2.4* I downloaded the app to help do a double check on my fueling in peak marathon training. I was disappointed to see that even with a performance fueling setting , the protein requirements were well above standard recommendations (2.2g/kG+ vs 1.6-2) and carbs were low!! This is setting up marathoners for low energy availability. For example, it suggested I only have 30g carbs after a 13 mile run with 45 min tempo workout which is far too low. I would not recommend for marathon runners. ### 1/5 — Misleading free trial *2026-07-28, version 2.2.4* It gave me a free trial option. I tried it for a day and it wasn’t for me. I went to cancel my trial. It took me several questions and then it said I had to cancel it in my app subscription. I had none in my apps and I kept checking it. A week later it billed me. This time it gave me an option to cancel in my billing portal (which wasn’t available during the free trial). ### 1/5 — Inaccurate *2026-07-18, version 2.2.4* The logging is extremely inaccurate and unable to log in grams or oz for accuracy ### 1/5 — 10 minutes wasted into a pay wall *2026-07-11, version 2.2.3* Marathoners: don’t waste your ten minutes like I did. They push you through a long quiz first, capture all your data, and then nonchalantly hit you with a $29/month paywall. No trial. Not even one screen of the actual app. I was very motivated to get with the program. I’m mid-training block and ready to invest in my nutrition. But I was let down by how the mechanics of this work: pay to play before you’ve heard a single note of the tune. Instead of a nutrition plan I got a quiz and a checkout page, and they got all my data for free. Frustrating to say the least. ### 1/5 — Dangerously flawed *2026-07-10* Shockingly bad. The carb recommendations after over an hour of max effort is zero and for the day below starvation levels even on ‘standard’ weight loss mode. The carbs actually are higher on aggressive mode. This is appalling and dangerous. So many other things wrong with it I don’t have time to write them. The food logging is easy. That’s it. ### 1/5 — When experienced falls shorts when you ask questions or wanna leave *2026-06-18, version 2.2.2* While the app’s technology is helpful, the customer support experience falls short. The team is attentive during upsell efforts, but shifts to sending dry, automated responses when you request to cancel. Navigating the cancellation process is difficult, as the support provided is impersonal and leaves users to solve their own issues without genuine assistance. ### 1/5 — Way too busy *2026-06-18, version 2.2.2* There is entirely too much going on. I’ve been training my entire life tracking workouts and meals. I signed up and ended my subscription in 5 minutes. ### 1/5 — Very mids *2026-06-16, version 2.2.2* A lot of food you can’t log it by weight, it lacks a function to provide ideals to hit macro targets per meal ### 1/5 — Not worth it *2026-06-09, version 2.2.1* In a nutshell the app is overcharging for what it is delivering. The idea behind the app is great but the way it was put into practice is a weak performance at best. I’ve been on the calorie deficit plan for 2 months now and I GAINED 5lbs. It is also frustrating that there is no feedback loop. I personally do not need or want an afternoon snack, yet I need a morning snack. Unfortunately the app overs absolutely zero way to personalize your plan. Entering the food consumed is tedious and the AI is always wrong. Even the barcode scanner provides the wrong macros. When I finally added my most used foods into my favorites, the app changes up those foods macros and servings almost daily. I logged it as a favorite, and yet I have to double check it every time. Great concept for an app. Very poor execution and way too high of a price for such an underperformance. ## Most praised reviews (10 highest-rated) ### 5/5 — Great for endurance athletes *2026-08-29* This app is one of the best apps I’ve found for helping me figure out how to fuel for training and racing endurance races. It’s still sorting out some occasional hiccups but the upgrades have been great and the developers are very responsive. ### 5/5 — New Approach to Tracking *2026-08-20* I would definitely recommend the app for people who are looking to maximize their performance in training without the commitment to a nutritionist. The App offers the option for actual consultation sessions with nutritionist too. ### 5/5 — Indispensable app for those who take their health seriously *2026-08-18* Fuelin has become indispensable in my health and cycling journey. As a 67 years old master cyclist who is overweight, Fuelin is an indispensable tool not just to track what I eat but to know how to properly fuel my body to be successful in my sport. One of the hardest things to do when you are trying to lose weight while building fitness is to know what to eat. I love that Fuelin suggest what should I eat for each meal when I am training or racing. And if I have one ingredient, let say a chicken breast, Fuelin builds a recipe around that ingredient that perfectly matches the macros for that meal. Because Fuelin syncs with Training Peaks it knows when my races are and creates a plan for carbo loading for the week of the race. ### 5/5 — Not just a fixed meal plan *2026-07-29* I love how Fuelin adjusts to my training and daily fluctuations. It helps ensure that I meet my energy needs for my cycling. It’s not just a meal plan, it’s basically a coach in your pocket available 24/7. Definitely recommend if you want to improve your performance and also manage body composition. Remove the guess work and trust the process ### 5/5 — Making nutrition fun!! *2026-07-14* As a runner, data is gold and I can never get enough of it!! I was a MFP user but have transitioned to Fuelin and it is a game changer!!!! The smart meals are GOAT and telling it what ingredients I have and it telling me how much of what to weigh to hit my macros is awesome!! I’m not making meals anymore with a scrap bit of paper with figures and equations scribbled all over it! AND I am feeling STRONG!!! There is no afternoon slump because I am so much more aware of timing for meals. I was very much a ‘protein’ focused girlie and I didn’t realise how little carbs I was consumed until it was in my face! Huge wake up call and probably great timing because I’m sure an injury was imminent… THANK YOU FUELIN!! ### 5/5 — Great tracker *2026-07-11, version 2.2.3* I know I’m am eating enough for my training which eases my mind. ### 5/5 — Improves nutrition to improve performance *2026-07-09* This app is super easy to use and helpful in planning/adjusting nutrition during high load days and rest days. I love that the macros are planned around my Trainingpeaks sessions. ### 5/5 — Detailed and accurate *2026-07-03* I thought I was planning and tracking well until Fuelin introduced some real discipline. Significant improved body composition and supporting increased race performance ### 5/5 — Love it! *2026-07-03, version 2.2.2* This app has been a game changer for me and my training. I am a marathon runner and have been using this app since November 2025z since then, I have lost some weight and have made a new half marathon PR by using gf this as my fueling gf guide for become, during and after training runs. I love how it keeps me in check with my macros to be sure I am getting what my body really needs. ### 5/5 — Finally an integrated App *2026-07-02* Finally an app that actually does what it says on the Tin, the ability to See on “Paper” what my body needs and what it’s actually getting through the nutrition I’m using to Fuel for Ironman training. It has made an enormous difference in my training performance and energy levels. Keep up evolving the App it’s 1 of my number 1 tools in the training bag. --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-09-07.*