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This project is to design a specialized android app for graphing a specific function. (Viscosity as a function of temperature)
The app needs to be made available on Google Play and iTunes and all e-commerce activities will need to be set-up by the developer. The app will need to be marketed on Facebook and google.
It will get its own facebook site (for me to manage after its creation).
The app will take a very specific function and plot the output of that function based on 4 variable inputs. The graph’s vertical axis will need to be a log log plot and the horizontal axis will need to be linear. The key to the whole project is the plotting…as the function will result in an easily identifiable straight line when plotted on these scales.
The input variable will be (viscosity1, temp1), (viscosity2, temp2). The viscosity data will be required to be input in specific units (cSt) and the temp data will be able to be input in C, F, R or K degrees (and then converted to Kelvin internally). The linear output scale can be in C, F, R or K as indicated by the user. It is important that the linear axis handle the negative numbers of negative temperatures.
The Vertical axis will be in cSt. We will neglect density for now.
A summary of the calculation in a single number is called the viscosity index. The Viscosity index will be placed on the graph in a predetermined location if the user desires it.
Multiple fluids will need to be plotted on the same graph. A maximum of 5 samples will be plotted simultaneously. A scheme for identifying the different lines will be required.
An open title field will need to be available if the user desires. The output of the equation will need to be saved to a csv file if the user desires it. (it would consist of header information and the temp,viscosity for all five sets of variable)
The plot will need to be, of course, displayed on the android app. The plot will need to be save off as a PDF if the user desires.
I am open to any and all other suggestions for user input features and enhancements that I may not be mentioning. There’s a world of functionality out there that I may not be in tune with. All functionality must be resident on the mobile device when not connected to any cell or wifi network.
It is important that bidders supply screenshots of apps they have previously developed (or links to them if that’s possible). I only have an android at the moment…so I can’t test iphone apps. If you've read down to this point, I need to ask you to please reply with a message telling me the color of a carrot. I've had too many people bidding on this project and after bidding deciding only then to read what is required. This technique of 'playing dumb' to increase the bid afterwards is extremely frustrating and won't be met with kindly.
Let me know if you have questions. I’ll post some pictures of some similar graphs (assuming I can find some).
Thanks for the help.
Additional Project Description:
10/18/2013 at 8:03 IST
I should clarify... Some people have asked about the graphics needed for the app. Quite simply, the app designer will need to provide the graphics. So, buttons, icons and such are all needed...and need to be included in your bid. Thanks,
10/18/2013 at 8:20 IST
A word on milestones. I want to be as fair as possible. So, to do that here is what I'd propose.
1. First milestone: After reviewing the attached files in detail, the developer will be asked to do a first pass on refining the sketches for the app workflow. Upon completion of this, basic, task...a $100 milestone payment will be made.
2. Second Milestone: We will then need to continue the refinement of the app flow. The primary deliverable, however, is the plotting of the function on the scales required. The app can be largely static (not fully fleshed out with all the inputs and buttons)...but the graph will need to be 'modifiable' in that we can test some of the inputs. Completion of this phase will result in a $500 milestone payment.
3.Third and Final Milestone: This is for the completed app and it's inclusion on Google play...with the correct accounting on Google established. (just in case someone actually wants to buy this app). The balance will be paid once this is complete.
If you understand this---and have read...(even if you don't necessarily agree) the requirements to this point...please tell me the shape of the moon.
Some people want a large initial milestone payment to get started. And, I'm sorry...but I think it's best to follow the outline provided here.
If you have questions...just let me know.