Analytics
You can't (accurately) improve things you can't measure. From Mixpanel to Google Analytics, there are all kinds of tools to make sure you're on track.
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Robintrack
Discover trends in the popularities of stocks on Robinhood
Sandpiper
Inventory tracking for people who hate inventory tracking
Data Analysis with Open Source Tools
How to think about data
Lossless
The easiest way to convert, clean, and transform your data
Intelligram
Know which photos are going to receive + likes in Instagram
The State of Snapchat Analytics
A Free eBook by Delmondo
Line Graph Maker
Create a line graph and download the graph as jpg or png.