# Watts Amps Volts Calculator — user reviews > 41 indexed App Store user reviews of Watts Amps Volts Calculator by Pro Certs Software Ltd, rated 4.40/5 from 50 ratings. - Source: https://appshunter.io/ios/app/watts-amps-volts-calculator/id450813841/reviews - App overview in markdown: https://appshunter.io/ios/app/watts-amps-volts-calculator/id450813841.md - Rating breakdown: 5★ 38 · 4★ 6 · 3★ 1 · 2★ 0 · 1★ 5 ## Newest reviews (15 of 41) ### 4/5 — Useful *2026-06-19* Thank you ### 4/5 — So simple and informative to use *2021-02-24* A great app to have on your phone if you sometimes need to know this electrical formulae . ### 4/5 — Works well *2021-02-17* Works well, would be nice to have a general chart of appliances wattages usage, but it is short and functional ### 4/5 — Good look *2020-06-04* My first week and it’s good so far ,,,,, Should have more to calculate tho... it make current & voltage assessments easier ### 5/5 — For someone who has lost his memory,this is great. *2020-03-24* 😁 ### 5/5 — Love this app *2020-03-09, version 3.3* This app does a great job for me. ### 4/5 — Nice *2020-02-21* Nice to have ### 5/5 — Great app, very useful. *2020-02-15* Very good. ### 5/5 — Everyday Projections DIY *2019-11-11* Easy to use Input data and calculates for you. ### 5/5 — Power converter *2019-07-25* Love the app . Works well for what I need to do ### 4/5 — Good *2019-06-24* Good ### 5/5 — Very good app helps really well *2019-06-09, version 3.3* Really nice app ### 5/5 — Yee yee *2019-04-12* Great app ### 5/5 — Very good. *2019-04-02* Easy, fun app to use. Highly recommended. ### 5/5 — Great App *2019-03-09* My app worked flawlessly. Glad I bought it. ## Most critical reviews (10 lowest-rated) ### 1/5 — Not ideal. *2023-10-29* Apps does the required calculations but only if you can get passed the adverts. Essentially you can’t always use it unless you willing to watch ads. Personally I just deleted the app because on this occasion it’s literally refusing to do the calculation without me running ads first. ### 1/5 — Endless ads *2022-03-22, version 3.5.3* This is junk! Ads ads ads! ### 1/5 — Adware *2022-02-09* Just a big ad ### 1/5 — Too many ads! *2021-07-08* I didn’t realize this app was going to be a non-stop series of adds! ### 1/5 — Pretty poor user experience *2021-03-13, version 3.4* How can the user field be pushed out of view every time you want to edit the field? ### 1/5 — Crashed within 30 seconds *2016-11-16, version 2.3* Cannot recommend. How do I get my money back? ### 1/5 — Very Poor, Waste of time and cash!!! *2015-02-06* I purchased the paid version after the free version, turns out it is not iPhone 6/iOS comparable? It's the simplest of code. I have no idea why it is not comparable? Will it ever be updated? **Developer response:** App now updated for iOS 11 & new UI redesign. ### 1/5 — radia407 *2012-10-02* This app does not work they stole my .99 this is a ripoff don't by they get rich by taking your money and giving you nothing. I want my money back I also don't understand why iTunes would let someone sell something without checking them out first these people or thief's. if you but this app your crazy just open a window and throw your money out at lease you know where it went. ### 1/5 — No good on I new 4s *2012-09-29* Not working on my iPhone 4S Screen all messed up **Developer response:** App now updated for iOS 11 & new UI redesign. ### 1/5 — Watts, amps,volts *2012-09-24* Does not work on IO6, can you please fix it or give me my money. **Developer response:** App now updated for iOS 11 & new UI redesign. ## Most praised reviews (10 highest-rated) ### 5/5 — Power Generation *2025-11-13* Awesome ### 5/5 — I like it *2025-08-21* It works well. 👍 ### 5/5 — Solar Calculator *2022-08-13* This app has been very useful in setting up a solar array. I’m old school and could do the math myself to convert the current, but this app is faster and accurate leaving me the time to design panel racks and other mechanical issues. Could’ve used this years ago. Overall a very useful app for the novice and the pro! ### 5/5 — Handy and free *2021-04-29* Watts not to like... see what I did there? ### 5/5 — Quick & Handy *2021-01-10* I used this app while building a solar generation system, it was very useful when calculating consumption of appliances and other devices. ### 5/5 — Conversion App *2021-01-09, version 3.4* Awesome app. Use it constantly. ### 5/5 — Easy and uncomplicated, simply the best ! *2020-12-26* Watts , Amps , Volts any you would like to do, this App is just what you need ! ### 5/5 — Good *2020-11-07, version 3.4* Does the job. ### 5/5 — R J *2020-09-17* Comes in super handy! ### 5/5 — Happy *2020-06-26, version 3.4* I have not thought of looking in the App Store, perfect for me! Love it! --- *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 2026-08-24.*