- 04-03-2012, 09:16 AM #1
The smart calculator for Windows Phone, and now also Windows 8! Over 25,000 downloads and an average rating of 4.5 stars (150+ reviews). Includes 5 unique calculators: Basic, Scientific, Programmer, Currency Converter, and Unit Converter.
Calculator² and Calculator² Pro
- live tiles for each calculator showing the history or latest exchange rates;
- over 50 scientific functions;
- 125 mathematical and physical constants;
- statistical functions for memory values;
- over 150 World currencies;
- over 200 units for conversions across 17 categories;
- searchable constants, currency, and units lists;
- customisable tax buttons;
- customisable button layout;
- Auto, Fixed point, Scientific, and Engineering display formats with choice of digit grouping;
- enable or disable operator precedence;
- support for both light and dark themes, and use of the accent colour;
- background task to automatically update the exchange rate information and Currency Converter live tile (paid version only);
- 64, 32, 16 and 8 bit word lengths for the Programmer Calculator, including signed or unsigned integers; and
- local region support for displaying numbers.
Last edited by richard_walters; 10-15-2012 at 03:26 PM. Reason: Updated the description to provide info about the Windows 8 version
- 04-03-2012, 05:45 PM #2
I installed it. I really like just how many functions are available in the scientific mode. I also like the updating for the currency calculator. The ability to move functions around as needed is a wonderful addition. The unit converter is nice, but I like the way that MathCalculator shows conversions. I had three calculator apps, and Calculator² has replaced one of them.
Thanks for the great app!
- 04-04-2012, 05:57 AM #3
Thanks for the review SolunaKitty! I'm glad someone figured out that you could move the functions around -- it was one of my favourite additions. I just hope that I've done enough with the YouTube video and help hints that people do realise it's there; not many people would think to hold down a button so it's kind of a hidden feature. The review below yours in the US asks for a rounding feature, but that's already in there by changing the display mode to fixed point and setting the decimal places. I now understand why calculators come with thick instruction manuals!
Hopefully at some point I'll add more calculators. A financial calculator should be easy, then a proper statistics mode and a graphical calculator would be nice. However, first I'll build a Windows 8 version, and before that finish my PhD thesis!
Thanks once again! I'm glad you like the app! :)
- 04-04-2012, 06:55 AM #4
Well, it helps that your description lists it xD Really? I thought it was pretty intuitive to hold the button; I mean, that's how we move tiles, so I figured it's the most natural to do so. It is the only app that I've seen do that, and I really, really like the feature. I also like the favorite constants thing (I've written out the speed of light enough to remember it as 299792458 m/s, and e as 2.718281828459045...) I normally like seeing my numbers unrounded, so that's not an issue for me, and I do know about float and fixed :D I know my way around my TI-89 for the most part, and doing derivatives, integrals, and solving for variables are awesome features that the older TIs don't have... but it does not fit in my pocket, and it does not go everywhere with me. (It stays in my computer bag, which I do bring along with me a lot, though).
Rewatched the video, and played with the Unit Conversion calc some more. I take back my earlier statement. This is my favorite calculator BY FAR now. It does much more than everything I want. I shall amend my review in light of this revelation! There is so much to like about this calculator, and it shall be the one I recommend to others!
Thanks for your hard work! I can see that it's not over yet xD Coolcool
- 04-04-2012, 11:09 AM #5
Ha, I tried out MathCalculator again and was wondering what you preferred about the unit conversion! Thanks for the updated review. With enough updates hopefully you can leave your TI-89 at home permanently and I can lighten that computer bag a bit for you. :P
Update 1.5 has just been certified and should appear within 48 hours. Nothing too exciting, mostly bug fixes. I hadn't implemented tombstoning correctly and the app has been crashing when resumed from this state. The app doesn't get tombstoned very often in Mango thanks to fast app-switching, so hopefully no-one noticed!
The latest post on the Windows Phone Developer blog talked about optimising startup time. While I couldn't really improve this any further, I have tried using more multi-threading in other parts of the app, and I should be able to improve the performance of some of the animations. For example, in the settings there's a pause each time the user flicks through the pivot items. I've managed to remove this and get a much better visual experience. So, update 1.6 underway...
- 04-04-2012, 06:35 PM #6
Yeah, I like this one more now, ever since I found out you can convert the converting unit number to more or less the SI unit AND the converted unit to find all applicable conversions (I did know to do second part initially, and that's the one I liked the most). Ahaha, admittedly, since I am no longer in class, I wont need the TI-89 for now. I doubt that my future workplace would make much of use of it also.
This app is quite worthy of purchase, and I think I shall do so after I have an income. One thing, though, is that the paid version of the app does not seem to be directly searchable in the Marketplace; I have to go to "more apps by [you]" to get to it. I wonder why that is. Anyway, thanks again for the wonderful app! :D
- 04-05-2012, 11:30 AM #7
One thing, though, is that the paid version of the app does not seem to be directly searchable in the Marketplace; I have to go to "more apps by [you]" to get to it. I wonder why that is.
All the apps are searchable under their names, but because of the ² character this is difficult to do on the phone with Calculator². It wasn't something I thought of beforehand, but I like the name and the ² character helps it stand out. I've used 'Calculator2' as a metatag for the free version in case people search for it that way. We're limited to 5 metatags per app, so in the paid app I've used 'base' instead so it appears if you search for 'base converter'. I figured most people will come across the app under searches for 'scientific calculator', 'currency converter', etc, and not by directly searching for 'Calculator²' or 'Calculator2'. Anytime I promote the apps online I use the web Marketplace link and QR code.
I've already noticed that I'm getting more people pay for Calculator² since the launch of Calculator² Free. I think a lot of people like yourself are installing the free version then liking the app enough to want to buy it. It's a shame this kind of model doesn't work better with the trial option. Unfortunately most people ignore the paid apps, and there's nothing in the Marketplace to show the apps have a trial mode until visiting the app page.
- 04-05-2012, 11:34 AM #8
Oops, just figured out there was a Quote button.
A little bit about how I came to build the app...
Richard Walters, graduate student at University of Oxford, talks us through developing his app Calculator² - Microsoft UK Students - Site Home - MSDN Blogs
- 04-05-2012, 03:28 PM #9
Oooh, I see, and that makes sense~
Oh? That's great! I don't do trials as often because I figure that most will expire at some point. Even if it's a full trial with no expiration, it would seem wrong if I just used apps like that. I also assume that all apps have a trial mode because I have not seen otherwise yet.
Read (rather, I listened) to the article. It's awesome that you started with just a simple calculator app to test the waters! :D
- 05-21-2012, 06:43 AM #11
Update 1.7 should appear in the Marketplace today!
New with the update is an Undo function, which can be found with → ← and C.E. (I've removed the extra Clear button) when a user taps the display. I received some feedback asking for this feature and I thought it was a great idea. It allows a user to backstep through each stage of a calculation, and therefore correct functions/operations, etc.
The app is now fully localised and I've added French language support. I've set up a community project at Calculator² - GetLocalization.com for users to assist in the translations. Of course, there's no obligation for anyone to take part, but if you like the app and think it would be useful for other users in your native language then please get involved! Much of the app can be translated using Wikipedia articles and online translators (the currency, constants, and unit lists, etc.), so if anyone does want to add a new language I can help with the bulk of the work. :)
Due to the addition of localisation some of the saved setting and lists have been reset with this update, so I apologise for any inconvenience here. There are some other minor changes, most notably with the About page and tiles.
I've begun work on porting the app to Windows 8! Much of the code can be reused, although things like localisation and saving data are dramatically different in WinRT. I have some good ideas for the Windows 8 version, and will post with updates (and perhaps a video) in the near future.
Finally, thanks to everyone who has downloaded the app!
- 05-30-2012, 08:00 PM #14
I like the programmers calc quite a lot, but is it a limitation of the OS to not do simultaneous ASCII conversion along with the others? Maybe allow removal of a number system, such as octal, and replace it with another...like ASCII.
Unless there's something in totally missing that's already there.
- 05-31-2012, 07:25 AM #16
At the moment clicking on an ASCII key simply adds the decimal representation to the current number, i.e. if I type 'Hello' then the decimal number reads 72,101,108,108,111 (it should actually be 310,939,249,775). What's worse is if, say, HEX is selected, then typing Hello sets the hex number as 72,101,108,108,111 also. Really I should have linked up the ASCII keys to set the Hex number only, i.e. if I type Hello then the Hex number reads 48 65 6c 6c 6f regardless of what base is selected, and then the other bases update automatically from that.
There's no problem in doing a simultaneous ASCII conversion and I'll add this in. I won't change the display, but instead show the ASCII string when the user clicks on ASCII. I'll add the extended ASCII keys also. An update for the app is currently being certified so I'll have to wait a few days before I can submit another update. Shall I post a picture on here beforehand showing the changes to the ASCII part? Also, would Unicode be a useful addition? I see that the iPhone 64 Bit Calculator has it, but I'm not sure how to easily add it in to the interface.
- 05-31-2012, 07:01 PM #18
Thanks for taking the time to respond here and in the forum, it was a no-brainer to purchase the app! Hope you don't mind suggestions. :-)
- 06-02-2012, 08:29 PM #19
I've added a textbox to view the ASCII string and fixed the way this works. A user can edit the ASCII string either with a keyboard or with the existing buttons, and all the bases update simultaneously. However, to view the ASCII textbox you have to click on the ASCII button. The text in the display would become too small if I added it there, and I prefer it separated anyway for UI reasons due to the slightly different functionality (because of the keyboard input).
I'm not quite sure what you meant in the second part of your post:
I don't have much time to spend on the app at the moment, but I'll try to post updates here, and hopefully I can add some screenshots too in the next few days.
- 06-07-2012, 11:14 AM #20
- 06-10-2012, 09:13 PM #21
- 07-31-2012, 12:21 PM #24
Thanks for the review Mjrtoo! I actually wrote a cover letter yesterday for a job application stating that I hoped my app helps people be more productive, so that's good to hear. I've also had a 5 star review in Russia recently which said that they especially like the programmer calculator.
I do plan to update the video, especially now that I've changed the design a bit (my original logo looks horrible!). However, I'll probably wait until there are a few more features to show off first. I'm planning a 2.0 version to include some or all of the following:
- graphical calculator
- financial calculator
- statistics calculator
- matrices calculator
- support for complex numbers in the scientific calculator
- date calculator
Of course I'm open to requests for anything else too. At the moment I'm working on a Windows 8 port, which is going well and hopefully I'll be able to finish during the Windows 8 preview. My recent updates have really been to prepare for this port and unify the feel of the two versions. There's one more update for the phone app currently going through certification to fix a critical bug, and that will probably be it until 2.0.
I'm really pleased with how things are going. I'm up to 15,000 downloads and getting pretty excited for Windows 8 + WP8!
Thanks again for the review!