Greetings, If I am using the blocks below but would like to create a downoload button that would allow users to download transaction history in csv file, which would contain date, Type and amount. these variables should be included in the the csv file. How do I put blocks for download button. any help would be appreciated. thanks
What you do to download depends on where you download the csv from. You did not tell us that.
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This is a list of links to community discussions of downloading csv. Read about the different solutions for different situations.
You might look at this tutorial.
It describes a project to build something similar to what you say you want to do. 
From the turorial I have seen, I am unable to do anything since I am in the process of learning this.
The data is being downloaded from tinydb.
Thanks
Downloading means downloading something from an external web source, not from the app itself.
An example of populating a TinyDb with expense information. The example code was originally coded by Dora. You might use as a model for your app
Here are some resources to help you learn to use the AI2 tools. A very good way to learn App Inventor is to read the free Inventor's Manual here in the AI2 free online eBook App Inventor 2 Book: Create Your Own Android Apps ... the links are at the bottom of the Web page. The book 'teaches' users how to program with AI2 blocks.
There is a free programming course here Course In A Box and the aia files for the projects in the book are here: App Inventor 2 Book: Create Your Own Android Apps
How to do a lot of basic things with App Inventor are described here: How do you...? .
Also look here App inventor español. Offline. Tutorial. Ejemplos. Instalación. Códigos. Juegos. Curso gratis de App inventor. and here Tutorial Index | imagnity for more tutorials including Imagnity.com List Tutorial, Mirrored - @Saj
Learn about components Component Reference
and visit the Library The MIT App Inventor Library: Documentation & Support Help>Library on the MENU
Do the tutorials to learn the basics, then use the file component to store your data in a csv file
Taifun
To give clarity. Here is the sample of aia file.
I would like to have that download button before view history on screen named as summary to have ability to download csv file containing data in the transaction history, that is date, time and amount.
I even paid someone to do this but the person is giving so many excuses making me think that maybe it is impossible.
ExpenseTracker (1).aia (3.2 MB)
Learn to work with lists and lists of lists
Then use the list to csv table block to convert your list of lists into csv fornat and
Taifun
