FAQ
If your questions aren’t covered in the FAQ, please contact me. Many 3 Numbers features and UI are demonstrated in the movie, so you may find watching it helpful.
3 Numbers Frequently Asked Questions:
1. Localization
2. Currency converter
3. Units converter
4. Tip calculator and condensed guide
5. General
6. Credits
1. Localization
Q. Which languages does 3 Numbers support?
A: 3 Numbers is currently only in English, but supports local numerical display for decimal separators (e.g., if you are in Germany, 3 Numbers will show a comma instead of a period to separate decimal places). Language translation is a high priority for future updates of 3 Numbers.
2. Currency converter
Q: Which currencies are in the currency converter?
A: The current supported currencies are:
• Australian Dollar
• Brazilian Real
• British Pound
• Bulgarian Lev
• Canadian Dollar
• Chinese Yuan
• Croatian Kuna
• Czech Koruna
• Danish Krone
• Estonian Kroon
• Euro
• Hong Kong Dollar
• Hungarian Forint
• Indian Rupee
• Indonesian Rupiah
• Japanese Yen
• Latvian Lats
• Lithuanian Litas
• Malaysian Ringgit
• Mexican Peso
• New Zealand Dollar
• Norwegian Krone
• Phillipine Peso
• Romanian Leu
• Russian Ruble
• Singapore Dollar
• South African Rand
• South Korean Won
• Swedish Krona
• Swiss Franc
• Thai Bhat
• Turkish Lira
• US Dollar
Q: I’d like to be able to convert a currency that you don’t currently offer!
A: Just let me know and I will look into what would be involved in adding it to future updates.
Q: Where do the currency rates come from, and how often are they refreshed?
A: The currency rates come from the European Central Bank and other national central banks. These banks publish their rates once a day in the middle of the day (so there’s no reason to press the “Rates” button in 3 Numbers more than once in a 24-hour period). There are currency rate sources which update more frequently, but those are market trading rates for the currencies, while the banks (for instance, your credit card bank or a bank exchanging your currency) use the major central bank rates to set their own rates for consumers. Consequently, there is no advantage to using the market trading rates unless you are trading currency on the bourses, since none of the ask and bid rates for currencies throughout the day end up reflected in the bank rate after trading has ended — only the last ones. If you would like the feature of getting market trading rates for currency, please get in touch!
3. Units converter
Q: There is a useful unit or conversion type that 3 Numbers doesn’t offer.
A: Please get in touch and let me know about it.
4. Tip calculator and condensed guide
Q: I’ve noticed that the rounding function on the tip splitter tends to round up more frequently than it rounds down. Is this a mistake?
A: Good eye! This was an intentional decision. When a number is rounded in the tip splitter and there are a number of people splitting the tip, there is either the possibility of each person paying a bit too much, or the server receiving too little, which can become quite a bit too little when multiplied by the amount of people splitting the tip. Losing $6 of a tip on a table of 12 in a place with $5 entrees would not be enjoyable. The risk of paying too much is always shared between at least two people on the bill-paying side, but the risk of receiving too little is always borne solely by the server. So, the tip splitter rounding function has a “fairness filter”: it rounds down for values ending with .25 or less, and rounds up for values ending with .26 or more, so that it is more likely to overtip than undertip.
Q: Where did the information for the tipping guide come from?
A: Some of it comes from first-hand experience, but most of it comes from having read as many sources as were available and thinking it over to see what seemed like standard practice. If you find errors or have more info, I would be delighted to hear from you and will incorporate corrections to the guide if they are verifiable.
Q: A few of the countries in the tip guide are probably not doing a lot of restaurant business at the moment.
A: I hope they will be soon, and don’t feel qualified to exclude them. Inclusion in the tip guide shouldn’t be read as a endorsement that a country is a good place to plan a vacation, though. Check your local laws and travel advisories for that!
5. General
Q: I found a mistake and/or bug!
A: Please let me know so I can fix it.
Q: I have something on my mind and it isn’t covered by this FAQ.
A: If I can help, get in touch!
6. Credits
Q: What are the credits for 3 Numbers?
A: The 3 Numbers credits are as follows:
3 Numbers Version 1.04 © 2010 Halle Winkler, all rights reserved with the following exceptions:
1. CocoaHTTPServer and CocoaAsyncSocket by Deusty Designs © 2009 (https://code.google.com/p/cocoahttpserver), used in the notes publisher with many thanks for an excellent library, and licensed under the terms of the new BSD license and the MIT license respectively. CocoaHTTPServer and CocoaAsyncSocket use AsyncSocket, a class written by Dustin Voss which is now in the public domain. Licenses reprinted below.
2. Modified excerpts from Erica Sadun’s MultiTouchView class as found in her book The iPhone Developer’s Cookbook © 2008 are used in the line-drawing routine, licensed under the new BSD license. Thank you Erica Sadun (https://www.ericasadun.com). License reprinted below.
3. A vector art flourish from Go Media’s (https://www.gomedia.us/arsenal/) Arsenal: Professional Design Weaponry set 8 © 2007, freely licensed, thank you Go Media, Cleveland rocks.
4. Mana Media (https://www.manamedia.com.au/) has given permission to use a corner flourish from their lovely collection “Flourishes” © 2007, as found on Vecteezy.com, in the interface of 3 Numbers without any special requirements. I also made use of other elements of “Flourishes” on this site. Thank you Mana Media!
5. The stock photo “Amp Tubes1” by Tim Vogt © 2004, licensed for digital use on a cell phone or website under the terms of the standard usage license of https://www.sxc.hu, great photo, thank you very much Tim Vogt.
Special thanks to Eva for assistance, encouragement, and everything else!
Licenses for CocoaHTTPServer, CocoaAsyncSocket, AsyncSocket, and MultiTouchView follow:
CocoaHTTPServer
Copyright © 2009, Deusty Designs
All rights reserved.
Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:
* Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.
* Neither the name of the <ORGANIZATION> nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS “AS IS” AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
CocoaAsyncSocket
Copyright © 2009 Deusty Designs
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the “Software”), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED “AS IS”, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.
MultiTouchView.m, MultiTouchView.h
Copyright © 2008, Erica Sadun
All rights reserved.
Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:
* Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.
* Neither the name of the <ORGANIZATION> nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS “AS IS” AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.