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Tydlig – Calculator Reimagined for iPad and iPhone

tydligapp.com

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Re: Tydlig – Calculator Reimagined for iPad and iPhone

#111

Post by dhaivatpandya »

jckt wrote: post #100
smikhanov wrote: post #68

Great to see more people attacking the underserved math app segment on the iOS. I'm the author of Scalar ( http://scalarapp.com ), another calculator replacement for iPhone / iPad. Just tested both versions of Tydlig very heavily, looks like the author ran into lots of the similar math/UI problems as I did when I was working on my app. :) Some approaches he has chosen look similar, some are unique. Great work, good l…

This looks rather good (sadly no iDevice). Looks as if Apple came up with it, if they weren't so silly with the way they applied their skeumorphism. I always imagined that if you were aiming for the mathematician market (huge market!!1 /s) you could have an app like that except on a tablet you'd use with a pen. Then you'd just write down calculations and OCR would figure out what you are trying to calculate and do th…

For research mathematicians, working on a tablet would probably just feel cumbersome; why not use a computer?

Re: Tydlig – Calculator Reimagined for iPad and iPhone

#112

Post by jweir »

So I bought it

Here are my thoughts as I use it (I will add to this comment. Hopefully the kids won't wake up soon.)

Wish there was an UNDO. I just moved a number and didn't want too. Shake to UNDO?

Pinch to zoom in and out. I'm using this on an iPhone.

Can I save a canvas? It doesn't look like, but maybe I'm missing it.

Re: Tydlig – Calculator Reimagined for iPad and iPhone

#113

Post by jamesaguilar »

smikhanov wrote: post #109
jamesaguilar wrote: post #98

Earlier quoted context omitted.

Some of the copy on your page is not quite right. "Each value could be . . ." -> "Each value can be . . .". There are one or two other places with this improper word usage. Just a heads up.

Thanks! It's hard to be a non-native speaker!

I figured that's what it was. Glad I could help.

Re: Tydlig – Calculator Reimagined for iPad and iPhone

#114

Post by ketralnis »

zarify wrote: post #7

I basically stopped using "calculators" when Soulver and more recently Calca came out. Much easier to use and a lot more flexible. That said the graphing in this looks quite nice.

Calca is amazingly good for its simplicity. It's replaced my use of Excel for the cases that Excel was overkill. Well worth the $5

Re: Tydlig – Calculator Reimagined for iPad and iPhone

#115

Post by peterhajas »

Lazare wrote: post #59
zarify wrote: post #7

I basically stopped using "calculators" when Soulver and more recently Calca came out. Much easier to use and a lot more flexible. That said the graphing in this looks quite nice.

Wow, Calca is amazing. Thanks for the tip. :)

Calca is such a great calculator. I've encountered some issues where it refuses to recompute (systems of equations confuse it when you keep redefining variables), but I suppose that's not what it's for. I love being able to define real functions in it. The documentation is also all composed in Calca, which is helpful.

Re: Tydlig – Calculator Reimagined for iPad and iPhone

#116

Post by superuser2 »

shurcooL wrote: post #19
jckt wrote: post #4

Graphing functionality on a phone reminds me of an old TI calculator. I really don't know why recent OSes (be it on PC, smartphone, tablet) always came with such feeble calculators. It's not like TI calculators are difficult to use. Sure if all you want is add/min/mul/div functionality the TI is essentially a traditional calculator, and then behind that you've got all these nifty graphing utilities. It's not like a g…

On that note, iPad doesn't even have the iPhone Calculator app, and it's _impossible_ to get it (without hacking) because it's a built-in app; one you cannot remove nor acquire from the App Store. It's also missing Compass, Voice Memo and Passbook apps. Edit: Weather app too.

Missing compass because the WiFi version does not contain a GPS or magnetic compass.

Re: Tydlig – Calculator Reimagined for iPad and iPhone

#117

Post by melloclello »

pascal_cuoq wrote: post #64
melloclello wrote: post #28

Earlier quoted context omitted.

I'm working on an RPN calculator (with some pretty sweet gestural functionality) which solves approximately half of those problems. Wait, no, more like a quarter. Welp. It does return the correct value for sin(π) though (you gotta call __sinpi(x / M_PI) if you don't want to return -8.74e-8 or some ridiculous value).

> It does return the correct value for sin(π) though (you gotta call __sinpi(x / M_PI) if you don't want to return -8.74e-8 or some ridiculous value). This is ridiculous. Your calculator (most calculators) cannot apply sin to π, because π is not representable is their system (typically base-2 or base-10 floating-point). What you have done here is make sine worse for all values, including the representable value close…

Phooey, I thought I'd solved this. What would you recommend I do instead?

I should clarify for other readers: __sinpi() is an Apple-created addition to Math.h, what it does is multiply the argument by M_PI before calculating. When you consider that my calculator has a key which inputs the constant pi (which is, of course, not actually pi, but M_PI), it all comes out in the wash (cosmetically speaking).

However, what would you do instead? Test before each trig function whether the argument is a multiple of M_PI and then choose which function to use? I would imagine this would fall apart at higher values...

Also consider that 'cosmetically satisfying' is not an unreasonable goal (in my mind) when the calculator really only has horizontal space for 12 digits in 36-point Helvetica, but you're right, as the user could arrive at arbitrary values by other means.

Re: Tydlig – Calculator Reimagined for iPad and iPhone

#120

Post by rooster8 »

smikhanov wrote: post #107
rooster8 wrote: post #91

Earlier quoted context omitted.

I'd love to hear you highlight a few of the unexpected challenges.

For example: 1. When someone enters "1 / 3" how many decimal places you display in the result? My approach: use MAX(4, MAX(decimal_places(entered_values))). His approach: use 3 everywhere. - Bonus 1: how many decimal places you display when someone enters "sin(3.14)"? What about "sin(1 / 3)"? My approach: use as much space you have on the screen. - Bonus 2: how do decimal places propagate when you're using refs? 2. W…

Cool problems I never would have anticipated! Thanks for sharing!
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