Calculator Plus v2 4+

Best scientific calculator for iphone and watch by far.

This app is unbelievable. Firstly it is free. Secondly it has no ads. Thirdly it works fully on the Apple watch. Allowing dictation input is an amazing feature and, with some practice, works really quite well, even on the watch. I have tried many calculators and this is the only one that has full functionality on the watch. As for the handling of % - it is perfectly logical. 5% of 300 is input: 300 x 5% (=15). Whereas if you want 300 increased by 5% then input: 300x105% (=315)

Cumbersome % logic (updated after response)

If I want to add 10% to 56, I expect the answer to be 61.6, whereas this calculator simply treats 10% as 0.1 and does not relate to the number I want it to operate upon. With normal input, the result reads:
56 + 10% = 56.1
To get the 'correct' (expected) solution, it is necessary to type the following:
56 x 10% + 56 = 61.6
Most modern calculators with a '%' button will allow the intuitive
56 + 10% = 61.6

It seems I'm out of step with the complimentary reviews from others and unfortunately, this app is not for me. There are plenty more 'ad free' calculators which easily outperform this, and do so with a less clunky interface.
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Having received a response from the developer, it seems necessary to expand upon the above.
I use many calculators (well over 40) including physical, hand-held devices, mostly for scientific purposes. Only two are not 'scientific', and not one of them utilises a % sign in the manner of this app - although I have seen and tested (and always refused) them. Furthermore, they are all extremely accurate and many have considerably greater precision. It would be neither fair upon the developer nor ethical to list them here.

However, I am pleased to read that the quicker, more intuitive method, which does not lose accuracy as inferred (unless very poorly programmed), may be included as a future option; in which case, I'll be happy to give this another chance.

Developer Response ,

(Updated reply, original reply removed due to length)
Hello!

This is actually not a standard notation - though, the most recent release of Calculator Plus provides the ability to opt-in and specify that you want to autocorrect your expressions to the valid notation with multiplication, so "56 + 10%" is automatically corrected to "56 x 110%", to obtain your expected result.

If any users choose to activate this functionality, bear in mind that this notation is non-standard and breaks expectations in mathematics. It may also not match how other calculators evaluate percentage changes with + or - symbols, since there are no established order of operations for this. This is what is meant by potential issues in the accuracy of the calculator.

Thus, take note of these important notes if enabled:
*** Anything with +x% or -x% with a leading number or percentage will be autocorrected.
*** You can no longer add multiple percentages together like "1% + 2% + 3%"
*** 50 + 10% + 6% = (50 + 10%) + 6%, and is NOT the same as 50 + 16%.

Ad Free . Ta

It really is Ad free. Thank you. I checked & this developer does some other interesting Apps.

Note to Apple who probably won’t even see this – Just opened my high powered ultra expensive computer calculating machine called iPad, I searched for a calculator without joy. So low & behold with all it’s available power it's not even capable of doing the most simple calculations that even my 20 year old phone could do. Utter rubbish.