igtrackr is a free Instagram analytics and follower-tracking tool that works on any public account with no login, no app install, and no card required. Paste any handle and it fetches followers, recent follows, unfollows, engagement, and top posts from public Instagram data in about two seconds, then tracks changes over time with daily and weekly delta updates on a saved dashboard.
Features:
- Follower and recent-follows tracking for any public account
- Unfollower tracking with daily/weekly deltas
- Profile Analyzer
- Instagram Follower Viewer sorted by time
- Engagement Rate Calculator with niche benchmarks
- Hashtag Analyzer
- CSV / JSON export
Use cases: creators and brand teams tracking their own or competitors' growth, detecting unfollowers, and benchmarking engagement. Free to start; Pro ($9/mo) and Agency ($99/mo) plans add more tracked profiles, longer history, alerts and API access.