# 10bii+ Financial Calculator — user reviews > 172 indexed App Store user reviews of 10bii+ Financial Calculator by Vicinno Soft LLC, rated 4.10/5 from 39 ratings. - Source: https://appshunter.io/ios/app/10bii-plus-financial-calculator/id734187686/reviews - App overview in markdown: https://appshunter.io/ios/app/10bii-plus-financial-calculator/id734187686.md - Rating breakdown: 5★ 26 · 4★ 4 · 3★ 2 · 2★ 2 · 1★ 5 ## What do users think of 10bii+ Financial Calculator? Overall sentiment: negative **Pros** - ✅ Accurate financial calculations - 👍 User-friendly interface - 🎯 Faithful HP 10bii emulation - 💰 Affordable compared to physical calculator - ⚡ Fast calculation speed - 📊 Displays entered values for verification - 🎓 Great for finance classes - 🔧 Responsive developer support (historically) - 📱 Convenient mobile access - 🧮 Comprehensive financial functions **Cons** - 🐛 iOS 13+ compatibility issues (critical) - 📵 App crashes on startup - 🚫 Won't open on newer iPhone models - 📱 No landscape mode support - ⚠️ Incorrect calculation results (some cases) - 🔌 Poor developer support responsiveness - 🔄 Inconsistent app loading - ⏱️ Slow startup time - 🎯 Amortization schedule difficult to access - 🔧 Abandoned development (2+ years without updates) **Commonly reported bugs** - App crashes immediately on iOS 13 and later - Won't open on iPhone X and newer models - Sigma button (standard deviation) non-functional - Incorrect rate calculations (I/YR) - Amortization calculations cause crashes - Inconsistent app opening behavior - Interest rate conversion not working - CST, PRC, MAR, MU functions non-functional - K (constant operation) not working - EFF%, IRR/YR, NPV functions not working - Shift keys cause app to close - Number input recognition issues - Text size display issues affecting bottom row **Most requested features** - Landscape mode orientation - Spreadsheet view for amortization tables - Visual feedback for key presses - Display input values during calculations - Apple Watch compatibility for TVM functions - Dark mode option ## Newest reviews (12 of 172) ### 3/5 — ダークモードで… *2026-07-22, version 2.56* 返済一覧がダークモードを標準にしていると読めません。修正をお願いします！ ### 3/5 — Landscape Mode Needed *2026-01-26, version 2.56* Landscape Mode Needed Please ### 3/5 — 숫자가 대충 10~12개 넘어가면 앱에서 튕김 *2020-10-19, version 2.54* 이럴줄알았으면 계산기 살껄 ### 2/5 — Keeps crashing *2020-08-01, version 2.54* Was working great for a while but now keeps crashing when doing certain calculations like amortization ### 4/5 — App is back *2020-03-02, version 2.50* After it crashed and burned on iOS 13.1, latest update has fixed the problem. Very clean financial calculator emulator. ### 4/5 — Thanks for getting it fixed *2020-02-26, version 2.50* Finally an update and now the app seems to work. I had found another app that I like better overall but this one makes some functions like TMV easier, so I will give this app a try again. Thanks for getting an update out. ### 4/5 — Doesn’t work iOS 13 *2020-02-26, version 2.50* The calculator worked as expected until iOS 13 was released. Now the app immediately crashes on my iPhone and my iPad. Update - the developer fixed the bug and the calculator works again. I raised my review up to 4 stars rather than 5. Unfortunately for me I already bought a different 10bii+ app. ### 4/5 — Updated and Works with IOS 13 *2020-02-23, version 2.50* Many thanks to the developer for updating the app for iOS 13. One star off for taking a bit too long to post a fix. ### 1/5 — 起動しない *2020-02-07, version 2.45* 2020/02/09購入しましたが使えません。返金してください。 ### 1/5 — App won’t open *2020-02-05, version 2.45* Used to work brilliantly on my older Apple devices. Just bought an iPhone XS and this app won’t open. It no longer works on newer versions of iOS from what I’m advised by Apple, as this app hasn’t been updated in at least 3 years. That’s a shame. Will need to find another financial calculator app. ### 1/5 — Not opening. *2020-02-01, version 2.45* This app worked for years. Now it has a glitch and won’t open consistently. ### 2/5 — App crash *2020-02-01, version 2.45* Does not open on mult iPhone XR ## Most critical reviews (10 lowest-rated) ### 1/5 — Produces incorrect result *2024-08-14, version 2.56* Kept giving incorrect answer ### 1/5 — Worthless *2023-11-29, version 2.56* This is horrible... does not work when I want to use for conversion. ### 1/5 — When trying to calculate standard deviation *2022-02-05, version 2.56* Sigma button doesn’t work! ### 1/5 — cpt在哪啊？？？？ *2021-11-28* 找不到这个键 ### 1/5 — Incorrect calculations *2021-01-05, version 2.56* This calculator produces incorrect results beware! A simple Rate calculation, with PV -1757, N 19, PMT 0, FV 8,254 produced a I/YR of 101.8! The correct answer is 8.7. If you are doing several calculations and rely in this calculator you might be embarrassed when presenting your results so don't trust this app! ### 1/5 — The free apps are better *2020-10-20, version 2.54* A bad purchase, I was so frustrated with it I ended up using a free app. Apple should have a money back guarantee on paid apps. ### 1/5 — Does not work for the IPad properly *2020-04-08, version 2.50* It is only display in a corner of the screen. You can not visualize in horizontal view. Don’t downloaded. ### 1/5 — Doesn’t work with iPhone IOS 13 !!! *2020-02-26, version 2.50* The app was great until my iPhone X was upgraded to IOS 13. Now it won’t load!! I’ve sent multiple emails to support, but it’s like a black hole!! No response whatsoever. I saw your response today, Feb 26th, and tried the app. Yes, the app now works on my iPhone X. Unfortunately, I needed the functionality for the last 3 months and had to purchase a 10bii app from a competitor. I was NOT HAPPY. You should have fixed the problem in a timely manner. 3 months is NOT timely. ### 1/5 — Crashing, won’t even open *2020-02-13, version 2.45* Don’t bother! Will return as soon as the payment shows in my account!!!! 😡😡 ### 1/5 — Won't open *2020-02-12, version 2.45* Worked for couple years now it won't even open on my iPhone ## Most praised reviews (10 highest-rated) ### 5/5 — Simply excellent rendition of classic *2022-04-30, version 2.56* The 10bii is the financial calculator for people to compare financial opportunities and products. This app is an excellent version of my trusty physical 10bii. The calculations are accurate. Great additional features in the worksheets. ### 5/5 — The best 10bii ever *2022-03-19, version 2.56* I have been using it for years, it works great. The calculation is fast and the UI is clean and easy to use. The developer listens to you when you have any suggestions. Thanks for great app. ### 5/5 — Recent updates *2020-11-25, version 2.56* I recall when the app wasn’t working...highly frustrating...but given recent updates, it works perfectly again. This app is obviously a must have for finance folk. ### 5/5 — New user *2020-11-08, version 2.56* I’m a new user, but became facile in minutes. Great app! ### 5/5 — アップデート万歳！ *2020-03-01, version 2.50* 先週（2020.2末）ようやくiOS13で起動するようになったようです。 ちょっと対応に時間かかり過ぎでしたがとりあえず使えるようになってよかったです。 ### 5/5 — Works again *2020-02-27, version 2.50* Hooray! ### 5/5 — Doesn’t load after recent Apple software updates *2020-02-26, version 2.50* I’ve been using this app for several years and have been very pleased with how it performs and how it closely mimics the HP 10b calculator. However, after several recent iPhone software updates, the app is non-responsive and the phone must be powered off and on before the app will open. Please fix ! Feb 26, 2020 Updated Review: Thank you for updating the app and correcting the problem. The app works great ! ### 5/5 — Developer fixed and works again. *2020-02-26, version 2.50* Works great again. Thanks. ### 5/5 — バージョンアップして欲しい！ *2019-10-21, version 2.45* 使いやすいので、重宝しています。 早くバージョンアップして欲しいです！ ### 5/5 — アップデート後立ち上がらない *2019-10-14, version 2.45* 非常に重宝しておりましたがiOSアップデート後立ち上がらなくなってしまいました。実務で使用しているので修正をお願いしたいです。 --- *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 2026-09-13.*