This Python script scrapes the web version of Instagram to get the number of posts, followers, and following from any public account. The data is then stored in a JSON file (InstAnalytics.json) so you can get track changes.
pip install -r requirements.txt
When you run the script, pass a list of accounts to track:
python InstAnalytics.py nike,drake
If you want to run it everyday at 6am:
crontab -e
0 6 * * * /usr/bin/python /path/to/InstaAnalytics.py