# The Fast Metabolism Diet — user reviews > 120 indexed App Store user reviews of The Fast Metabolism Diet by Brainstorming Session Inc., rated 3.40/5 from 186 ratings. - Source: https://appshunter.io/ios/app/the-fast-metabolism-diet/id626362411/reviews - App overview in markdown: https://appshunter.io/ios/app/the-fast-metabolism-diet/id626362411.md - Rating breakdown: 5★ 67 · 4★ 28 · 3★ 36 · 2★ 18 · 1★ 37 ## What do users think of The Fast Metabolism Diet? Overall sentiment: neutral **Pros** - 💻 Easy to use - 🔍 Helpful for planning meals - 🔔 Useful reminders - 💪 Effective for weight loss **Cons** - 🕰️ Inflexible meal times - 📋 Incomplete food lists - 🔀 Inconsistent with book - 🐛 Buggy and outdated **Commonly reported bugs** - Can't change start date - Incorrect portion sizes - Meal planner issues - Unresponsive time selector **Most requested features** - Save custom meals - Weight loss tracking - Sync across devices - More recipe integration ## Newest reviews (17 of 120) ### 3/5 — I Would Like This A Lot More If... *2026-01-31, version 2.21.11* I like the app. It is a little clunky but it works. I would like it a whole lot more if they just added a feature to save my meal. If I make a meal that meets the requirements and I enter it, I want to be able to save that meal so that I don't have to enter it item by item every single time I eat that meal. If I could save a meal bank for each phase that I could then go in and click if I was going ti eat that again and it would automatically check all the boxes for chicken, brown rice, tomatoes, etc, I would be super happy and give it 5 stars. As it is, I am just slightly annoyed and give it three. ETA: I also wish it had a graph that tracked weight. ### 3/5 — I Would Like This A Lot More If... *2025-07-14* I like the app. It is a little clunky but it works. I would like it a whole lot more if they just added a feature to save my meal. If I make a meal that meets the requirements and I enter it, I want to be able to save that meal so that I don't have to enter it item by item every single time I eat that meal. If I could save a meal bank for each phase that I could then go in and click if I was going ti eat that again and it would automatically check all the boxes for chicken, brown rice, tomatoes, etc, I would be super happy and give it 5 stars. As it is, I am just slightly annoyed and give it three. ### 4/5 — More foods *2025-01-27, version 2.21.11* I’ll being using this app since 2016, and still there are some some fruits, veggies and other things that are not included, and it is a little frustrating because I want to consume them but I don’t know under which phase put them. ### 4/5 — Update app *2025-01-04, version 2.21.11* Please update the app. It’s slow and it doesn’t seem to work right away when you click on a button. ### 3/5 — Needs update! *2024-05-16, version 2.21.11* I have been doing this diet plan for years and the app looks the same as it did when I purchased it over 5years ago. The investment users are making into books, shakes etc the least that could be done is a more modern and updated app.! ### 4/5 — App Issues *2023-05-18, version 2.21.11* I like the diet and app, but two things. First, the app has been opening to yesterday rather than today, and it has been doing that since I restarted the diet. (I don’t know if this makes a difference, but I traveled across two time zones when starting this time). Second, the Phase 3 breakfast meal “B and B Toast” wrongly populates as having a protein (it doesn't) and leaves the fruit section empty despite the recipe including berries Other than these glitches, the app is always helpful to doing the diet ### 4/5 — Simple app but it works! *2023-04-17, version 2.21.11* I’m writing this review as it is the 10 year anniversary of the Fast Metabolism Diet book. I preordered the first edition and did a few rounds of the diet the past 10 years. I want to say that the diet works and this App, although not perfect, is a great tool at your fingertips. I put on Covid-Menopause weight and although I have not re-read the book entirely, I’ve been on this diet non-stop for the past 7.5 months just following the app prompts, and have lost 40+ lbs so far. I praise this diet to anyone who wants to hear how I did it. The app does need an update, but it works nonetheless. ### 2/5 — This app is useless except for planning *2023-02-26, version 2.21.11* My husband and I are doing this diet. We read the book. We downloaded the app to facilitate things. We’ve been very frustrated with it. Really, all it’s good for is meal planning, and that is absolutely it, and even if that’s all you’re using it for you’ll be frustrated. Pros: water tracker, planning times/foods for meals. Cons: 1) You’re not really “tracking” your food if you can’t enter everything that you eat, even if it’s something that’s not supposed to be there. There should be some way of entering foods that are either off-limits or out of phase. (Side note: I’m pretty sure you can email your data to the company so they can analyze what you’re eating…what good is that when you cannot truly track things?) 2) In that same vein, it doesn’t let you track your portions. That’s fine if you’re someone trying to lose 20 pounds or less (1 portion), but as she says in the book, if you’re trying to lose more than that, you will need to increase your portion sizes. Well…you can’t track portion sizes here. I have many more gripes with it but those are the biggest. I do think this is a good way of eating so far, so I give the diet a hesitant thumbs up (only in week one) but this app needs some work. ### 4/5 — Love the App but wish it had a copy feature *2022-02-03, version 2.21.9* The App was a life saver. I love the plan with the check boxes. I love that you can customize the food list to remove the foods I don’t eat. The grocery list is a great feature too. My only wish is if it could copy meals since I eat a lot of the same foods. ### 3/5 — App needs an update *2022-01-09, version 2.21.9* Love this app as it’s easy to log and keep up with the Fast Metabolism journey! But it seems very outdated and needs a re-vamp. ### 4/5 — Meal map should default to the current day. Selections are too dark *2021-01-27, version 2.21.9* This has always been a good eating plan for me, and I like that it has an app. That’s really helpful. However, the latest version of the app really needs some more updating. When I open the mail map I should be automatically taken to the current day. Because that’s what I most like to be checking. Also when going into select items, they are currently unreadable. At least on my iPhone, the print appears very dark and only pops out in a lighter color when you select it. It’s unrealistic to select every single item in a category just to see what it is while planning your meals. Please fix it. ### 3/5 — App frustrates users to point of no return-how scientific is that? *2021-01-27, version 2.21.9* I did the 28 day FMD & used the book & app. I took a 3-week break using the Cooling for FMD book. Kept at same weight. Love the science. Now I started the 14-day fast start to lose my final 5#, so I bought the big tubs of Ph1-2-3 Shakes. Turned to the app to track my 14-day journey. 1. It doesn’t let you add a shake for a meal, only to BUY product. 2. It doesn’t have the recipes listed in the 14-day fast start, so it was useless. I suggest a complete overhaul of the app (it’s obviously ancient) w integrated permission levels to reflect Member access, 28-day option, 14-day FS option, 7-day, Burn, Revolution, etc, etc. include recipes, tips, reminders, etc. As it is now, the app smacks of a dominant commercial focus, with little of “Hailey” present. This is not the sense I got from the book & website, and it’s shameful. Hailey, are you listening? ### 4/5 — Useful but... *2021-01-18, version 2.21.9* I use this app as a guide for the diet and it is helpful BUT the food lists are not complete and Pomroy is very careful to make sure you pay for any in depth features. So even though the food lists (most vital part of the diet) apparently can't be included in an update, ads for more books can now pop up. This diet works well for me but be aware that it is expensive overall. I think it is short-sighted on their part not to make the app more dynamic. If I an using it every day, why not use the app as a way to integrate the latest promotions and supplements? It is my understanding that the book publisher holds the reins for some of these issues. Overall, the app ends up being somewhat old fashioned looking. ### 3/5 — Helpful but needs improvements *2021-01-09, version 2.21.9* The app is helpful to track meals. It would be great to access the recipes right from the app. I do have the cookbooks and an annual membership. So I should have access to the recipes. It would be a great option to have a code for members to use or for those who have purchased the books to access the recipes. I would also love the option to add exercises and other activity options for each phase. The shopping list is nice but I only tried to use it once and it didn’t compile the items needed but added another line. It’s been a long time since I’ve tried it since it didn’t make shopping easy. I have enjoyed many of the recipes and the information offered in the books, on the website and I’m now trying to get involved with Facebook. I look forward to seeing improvements to the app:) ### 3/5 — App opens on the last day - annoying *2021-01-04, version 2.21.9* I have done FMD before and doing it again this month. Just annoying that I opens up on the last day - so I have to keep pressing the arrow back to manually return to the right day. It would be nice to have a calendar to just select the specific day/date to jump to. ### 3/5 — G-d help you if you need to add a snack *2020-10-26, version 2.21.5* No way to set the time properly ### 4/5 — Good app for FMD *2020-09-13, version 2.21.4* If you are doing the Fast Metabolism Diet, this app is incredibly helpful. You can plan your meals and even generate a shopping list. You can quickly find what food are allowed in which phases. It does include quick pick of the recipes in the original book. I wish it also included recipes in her subsequent book and in the website, if only the most popular ones. ## Most critical reviews (10 lowest-rated) ### 1/5 — Glitchy and outdated *2022-07-27, version 2.21.11* The calendar gave me two days or phase one and pop up to buy supplements. Not a good start. What a shame, I was really excited to use it. The plan is the healthiest I’ve seen, ever. It’s not easy and a solid tool would make the FMD much more comprehensive. This definitely hurts the brand. ### 1/5 — So frustrating to use *2021-04-05, version 2.21.9* I keep a night owl schedule which has me going to bed at 4 am and getting up a little after noon. My first meal would be 1 pm but the app doesn’t allow that. I shifted times earlier in order to plan, but the app uses my device’s clock time to show the meal it thinks I should be having instead of the one I’m actually at. So, at 1 pm when I would be having my first meal, it will only show the snack I’m supposed to have at 3 (noon start is latest it will allow for breakfast). I’d just like to enter meals by sequence without a set time. Doing the actual planning is also very frustrating. The app has little flexibility and is hard to use so I’ve decided to delete it and go back to my notecard and Excel strategy for meal planning. ### 1/5 — My Normal is not App’s Normal *2021-03-19, version 2.21.9* I thought I had a sleep disorder. Until I realized it is “my normal” to be wide awake at 1 am. The App refused to allow my first meal input with 30 minutes of waking at 1.00am. Oh, well I will track the FMD using pen and paper. ### 1/5 — App issues *2021-03-14, version 2.21.9* The app will not close once open. The only way to close it is to turn the phone off ### 1/5 — The Burn *2020-12-08, version 2.21.9* On the back cover of The Burn it says there is an app -> I imagine it’s intended to match up with any of the I-Burn, D-Burn, or H-Burn ??? hello? ### 1/5 — Used to be good *2020-11-25, version 2.21.8* This app used to be good but has not been updated (visually and information) since it was developed. Long overdue for a more modern look and feel with color schemes that are readable. Some parts of the app are illegible due to the poor choice in background colors and corresponding fonts. ### 1/5 — Update *2020-08-12, version 2.21.4* Needs to be updated ### 1/5 — Needs an upgrade *2020-06-29, version 2.21.2* This App is not updated for years. ### 1/5 — Terrible update *2020-06-13, version 2.21.2* With the new update, new annoying bugs were introduced. I can’t see the time wheel to choose the time of day. I can feel it spin when I touch where it’s supposed to be, but I have to pick time by trial and error. When I update a meal or activity it doesn’t show up until I go out of that day and then back in. Need new update!! ### 1/5 — This could be so good *2020-05-31, version 2.21.2* This app could be a really good tool to support people on this lifestyle. If Haylie put as much effort in this app as she does selling those replacement meals this would be brilliant but at the moment it feels like it was created by 5 year old. Basic things not working like being able to change meal times. ## Most praised reviews (10 highest-rated) ### 5/5 — Just WOW! *2025-03-09, version 2.21.11* I stumbled across this three years ago. I was overweight and my husband was dangerously overweight with type two and other maladies exacerbated by the poor way that he ate. I've had to be more careful about things I ate due to Crohn's and a stenosis in the gut where they removed a portion and put me back together. But we were both in need. I showed him the article which I probably found in a woman's day magazine. I was shocked when he told me he believes he could do this. Together we lost a ton of weight. Life happened and we derailed due to family death and sale of home and a huge move which caused less time to cook and pay attention to our bodies. I lost my hubby in May, I continued to lose weight but I've put on about eight pesky pounds and I need to eat better so I'm starting this again. I can't say ENOUGH about the energy we had during the months that we followed this plan. From the bottom of my heart I thank you. It's simple to follow and though there are a couple days where your mind thinks you're depriving yourself, the other five days make up for it. If you want to lose it, this IS the key. Tricking your metabolism. Don't go your whole life feeling miserable and not liking how you look like in the mirror. I was old when I started this. I regret not learning about it years ago. This is it and it was inexpensive. You feel a difference from week one and it only gets better. Highly recommend!! ### 5/5 — Amazing *2024-06-29, version 2.21.11* We love this ap! So easy to keep track of your foods and times you eat, it’s my favorite! ### 5/5 — Recipe *2023-02-05, version 2.21.11* Hello I can’t find all the recipe in the list on the app so I can log it in ### 5/5 — Love this app! *2022-11-05, version 2.21.11* This app keeps me on track with planning and staying on course! ### 5/5 — This really works if you follow it to the letter *2022-06-05, version 2.21.11* A friend of mine had lost weight quickly and told me about this app. I don’t know how it works, but it does. I was approaching 200 pounds, the first 4 days I lost 3 pounds. I kept with it, ended up losing 30 pounds. Note I did also increase my exercise, but not at a crazy amount to where I would’ve lost that much weight without following this program. ### 5/5 — I really like this app. *2021-03-09, version 2.21.9* This app really helps with meal planning, portion sizes, and timing of meals. ### 5/5 — Love the app to track food *2021-02-17, version 2.21.9* I followed the FMD about 3 years ago and lost 20 pounds and have kept it off. I’m starting again to see if I can get my A1C down and lose another 20 pounds. ### 5/5 — Great but need some more options! *2020-08-22, version 2.21.4* Really easy to use but should include some more food and convert portions to grams. ### 5/5 — Wonderful Support to my FMD Journey *2020-07-25, version 2.21.3* I can’t imagine doing the Fast Metabolism Diet without this app! No more shuffling papers to see meal maps or check approved food lists to see what foods are phase appropriate. Being able to create and download the grocery lists is awesome! AND Portions are automatically figured for me based on my weight loss goals! It makes the diet even more easy peasy! ❤️❤️❤️ ### 5/5 — This app is fabulous *2020-05-25, version 2.21.2* It was extremely helpful to have this app while trying this diet and it really made a 30lb difference in my life. I definitely come back to this app once a year to maintain weight. Thanks --- *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 2026-09-09.*