# 1RM Calculator - One Rep Max — user reviews > 38 indexed App Store user reviews of 1RM Calculator by David Bai, rated 4.50/5 from 222 ratings. - Source: https://appshunter.io/ios/app/1rm-calculator-one-rep-max/id681279192/reviews - App overview in markdown: https://appshunter.io/ios/app/1rm-calculator-one-rep-max/id681279192.md - Rating breakdown: 5★ 175 · 4★ 22 · 3★ 5 · 2★ 4 · 1★ 16 ## Newest reviews (13 of 38) ### 2/5 — Pro glitch *2024-07-24* For everyone who is having issues with pro not workin, simply click restore purchase on the pro ad screen. 2 stars because this isn’t fixed ### 3/5 — Great ideas, needs some polishing. *2023-09-29* I love that I can actually build my own programs and set different methods to drive progression. Some of the ui and quality of life features could use some work ### 2/5 — Pro not working? *2022-07-29* Hello. I hope the developers read this and reach out to me. The app itself is very simple to use and has everything I was looking for. I upgraded to pro because the workout selection was very minimal, and $2 didn’t seem like a lot to me, since this was an app I was planning on using daily. However my credit card was charged and my app still says basic. I tried closing the app completely and even restarting my phone entirely. Such a bummer that this happened. Seems that by reading other reviews I wasn’t the only one this happened to. Users beware! ### 2/5 — Ok-ish *2022-07-10, version 4.5* UI leaves something to be desired. It is pretty simple but missing some features that I believe should be available. Things that should be available: The ability to re-arrange your exercises so you can get a specific order. The ability to re-name exercises. The ability to deleted exercises. ### 4/5 — Great almost perfect app *2022-02-23* Adding a feature to see all the trend lines of the lifts on one graph as one of the screens would make this a perfect app. ### 3/5 — Glitchy *2021-01-18* Pro does nothing. Good for one rep max but I want to see percentages of lift for quick reference ### 3/5 — Can only track a single set per day *2020-10-17* It would be more helpful track more than one set per day. ### 2/5 — New “upgrade” is a definite downgrade *2019-03-27* An app that worked perfectly before with full functionality, now requires an upgrade to remove ads and use all of it. Huge disappointment. ### 4/5 — Simple and clean design *2018-03-16* Easy and fast to use. I’d happily pay for the upgrade to pro, but the app seems to have been abandoned. My only complaint is that it doesn’t use the full screen size in the iPhone X. ### 1/5 — Ok. But a few annoying bugs *2014-11-06, version 2.02* This seems to be the best app for doing a single calculation of one RM. However, it clearly wasn't tested very much beyond that. Try entering a three digit number for your weight. The "percentages" view is truncated. You can only read 2 of the numbers! What's the point. An app this simple should be perfect. 67% of the features are broken!!! ### 2/5 — Scam - looks nice though *2014-09-30* You can't do anything but calculate weight*reps to get a one rep max everything else advertised requires an in-app purchase ### 4/5 — Good app *2014-08-30* Dropped a star because it doesn't allow me to use decimals. ### 1/5 — Crashes after upgrading *2014-05-25, version 2.02* I bought the upgrade and now when I try to go to the features that I payed for, the app crashes, every time. ## Most critical reviews (10 lowest-rated) ### 1/5 — Upgrade *2022-08-31* I paid for the upgrade but it won’t let me access those features. ### 1/5 — Didn’t switch over don’t pay *2022-08-15* Upgraded to pro for $2 didn’t switch from basic to pro ### 1/5 — App doesn’t give you access to Pro *2022-03-02* Bought the pro version only for it to ask my again to purchase it. Even tried to close the app and open again still nothing. ### 1/5 — Glitchy. Doesn’t work. *2022-02-28* I actually paid for the pro version and it wouldn’t switch over from the basic app. I never received the access that I purchased. When trying to send an email under the “send feedback” button, the email wouldn’t go through. This is extremely glitchy and a waste of money. ### 1/5 — retarded unit is cost *2021-03-31* lb to kg asks for money. did you really have to do this? ### 1/5 — I paid but couldn't upgrade *2019-11-21* 😡😡😡😡😡😡😡😡😡😡 ### 1/5 — Fix my error *2019-10-13* I paid to upgrade to pro but it didn't work. Refund or upgrade quickly 😡. ### 1/5 — only working if you purchase pro version *2019-07-16* just “rep x weight” it’s done no percent no “kg”, only “lbs” it is not free ### 1/5 — Broken *2019-05-06* The + button crashes app. Even the feedback e-mail link is broken. ### 1/5 — PT *2016-05-15* This app only works if you purchase the pro version. Don't waste your time on this version. ## Most praised reviews (10 highest-rated) ### 5/5 — Jack *2026-07-30* This app is so great! It has helped me figure out ratios with all my different routines. Thanks RM1. ### 5/5 — very accurate *2022-03-08* very accurate ### 5/5 — Great *2016-03-01* Great app! the best app to calculated your 1rep max! ### 5/5 — 1rm *2015-09-06* This app gives you your 1rep max with out risk of injury plus it's simple ### 5/5 — Great *2015-07-14* Helps you figure percentages and make you want to surpass those rep ranges. Simple and basic all you need. ### 5/5 — Excellent update *2015-07-10* Simple, focused app that does what it promises with taste and style ### 5/5 — Love this app! *2015-03-30, version 2.03* I've tried at least 5 other max rep apps and this is my favorite, by far. Does exactly what I want a max rep app to do. ### 5/5 — Solid App *2014-04-30, version 2.02* This is a very solid app. That's all I have to say. ### 5/5 — Simple fast and easy *2014-02-26* I know you can go online and use any old calculator but this handy little app will make it easy to get everything you need to calculate, quickly, as you train. To make this app useful pay the 69p it's worth it for the time it saves. ### 5/5 — LOVE IT *2013-12-18, version 2.01* Makes my life so much easier. I know exactly what weight I will be able to work up to, especially on squat day. --- *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 2026-09-04.*