# Significant Figures Calculator Pro — user reviews > 20 indexed App Store user reviews of Significant Figures Calculator Pro by Ajay Penmatcha, rated 4.70/5 from 35 ratings. - Source: https://appshunter.io/ios/app/significant-figures-calculator-pro/id918167029/reviews - App overview in markdown: https://appshunter.io/ios/app/significant-figures-calculator-pro/id918167029.md - Rating breakdown: 5★ 32 · 4★ 1 · 3★ 0 · 2★ 0 · 1★ 2 ## Newest reviews (7 of 20) ### 5/5 — I have found inner peace *2014-10-19, version 1.0* This app helped me find jesus God bless it ### 5/5 — Very well done *2014-10-16, version 1.0* This tool is really awesome especially for a first year chem student. We have a sig fig test coming up and this app has saved me! Using this app to check my work as well as give me explanations for the problems I do has been a HUGE help. THANK YOU!! ### 5/5 — Very useful tool *2014-10-16, version 1.0* I wish I had this in chemistry! Now in physics, this calculator is invaluable. It's not always easy to remember the rules but this calculator makes it so easy. With it I can be sure I am doing the problems with the correct significant digits as well as learn the reasons for why the answer is what it is. ### 5/5 — So helpful *2014-10-16, version 1.0* I no longer have to spend time figuring out those pesky significant digits! ### 5/5 — Super helpful *2014-10-15, version 1.0* I am a chemistry student and I cannot tell you how much easier this app has made learning significant digits. It is an awesome way to check my work and I can say that this has definitely improved my grade. The explanations and rules sheet are also awesome. ### 5/5 — Amazing App!!! *2014-10-15, version 1.0* This app is so convenient! It is really useful now that I am in chemistry! This app is fast, easy, and simple! I love this app so much! 😀😀😀😀 ### 5/5 — Awesome *2014-10-15, version 1.0* This is definitely the best sig fig calculator on the market. It surpassed my expectations. Also the explanations it provides are REALLY valuable. ## Most critical reviews (10 lowest-rated) ### 1/5 — Does not work in all situations *2019-10-23* Can give incorrect answers - I would not trust. ### 1/5 — No infinite sigfigs *2016-04-22, version 1.0* This app has no ability to mark an occasional input to "be infinite sigfigs." Without this functionality many chemistry calculations come out all wrong. It's very common to to have to divide by a number (say 1/3 or 1/2) with 100% precision, like stoichometry conversions, and the app screws up by narrowing the answers sigfig to 1! Just add an infinite sigfig button and your app will rock! ### 4/5 — Good idea, useful app *2014-11-04, version 1.0* This is a good idea for a calculator app. I teach university chemistry and see how useful this might be for students learning about sig. figs. A few caveats, however. Sig. Figs. is an simplistic approach to propagation of errors. If you’re serious about sig. figs., then this calculator may give you wrong answers. That is because it does not — and I see no easy solution in a simple calculator app— include the covariance between numbers. Ignoring covariance will give you less significant figures than you actually have. As a chemistry professor, what I would like is a calculator that understand units and dimensional analysis. That would be a great app! ### 5/5 — Very Good App *2017-08-04, version 1.0* I use this app for a variety of ways. Works like a charm. ### 5/5 — Great app *2016-05-25, version 1.0* I LOVE this app because not only does it give the answer but actually teaches you why it came to that conclusion. ### 5/5 — It works very well! *2015-01-15, version 1.0* This is a useful calculator that will even explain its calculations. ### 5/5 — Thank uuu! *2014-12-15, version 1.0* Good app and really helped me study for my tests and complete worksheets faster ### 5/5 — Best SiFig Tool Ever *2014-11-10, version 1.0* I have a sig fig quiz tomorrow and our teacher either stinks or I stink as a student (highly unlikely but still possible) and this app is amazing for it. It teaches you and tells u why the answer is the answer!!! Thanks a ton to the developer!!! Not a single flaw. ### 5/5 — 0 love *2014-10-23, version 1.0* I, as a number 0 enthusiast, have always felt that 0 never got it's due. Other calculator apps would not let me put importance on the 0. But this app. This app has renewed my faith in numerals. The 0 has once more become significant! It shall no longer be overlooked in calculations! Hail the mighty writer of this app because He... Is... My HERO. ### 5/5 — Awesome! Science salvation! *2014-10-22, version 1.0* This app is great! Not only does it do the sigdig calculation, it also helps you learn it by explaining the rules! Great interface, easy to use. This app is light years ahead of its competition! Hurry and download it while it's free! ## Most praised reviews (3 highest-rated) ### 5/5 — This = Good *2014-10-22, version 1.0* this helped me find my inner Zoroaster. ### 5/5 — Phenomenal!! *2014-10-21, version 1.0* This app by far is the best sig digs calculator out there. It's great and very useful and helpful when your in Chem or Physics. Thanks Ajay!!!! :) ### 5/5 — Great app! *2014-10-21, version 1.0* This app is absolutely fantastic, especially for those that are just learning about significant figures. I definitely wish I had this back in chemistry and it's a fantastic tool for students. Couldn't recommend more! --- *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 2026-06-10.*