Katch is one of the newest Instagram follow trackers on the market, growing quickly since its mid-2025 launch. If you've seen it come up while searching for a way to see who someone recently followed on Instagram, here's what it actually does — and how it stacks up against Radarrr.
What Is the Katch App?
Katch (katch.io) is an Instagram tracker built around one core feature: showing you who someone recently followed. It also bundles in unfollower detection, ghost follower identification, and anonymous story viewing — making it a broader Instagram analytics tool rather than a pure recent follow tracker.
Katch is available on iOS and Android.
What Katch Does Well
Breadth of features. If you want recent follow tracking, unfollower alerts, and anonymous story viewing all in one place, Katch covers that. Most competitors focus on just one or two of those features.
Local data fetching. Katch fetches Instagram data locally on your device, which they position as a privacy advantage — your data isn't being sent to and stored on their servers in the same way.
Clean interface. The app is well-designed and easy to navigate for a relatively new product.
Where Katch Falls Short
Almost everything requires a premium subscription. The free tier exists but the core features — tracking recent follows, receiving notifications, viewing unfollowers — are all locked behind a paid plan. You can't meaningfully evaluate whether it works before paying.
Limited track record. Katch launched in mid-2025 and has around 15,000 downloads at the time of writing. That's growing fast, but it means fewer real-world reviews to judge reliability against, especially for notification accuracy and update frequency.
Notification delays. Katch notes in its own App Store listing that alerts can arrive with a delay — which is honest, but worth knowing if real-time alerts are your main need.
Radarrr vs Katch
| Feature | Radarrr | Katch |
|---|---|---|
| See recent follows | Yes | Yes (paid) |
| Push notifications | Yes | Yes (paid, delayed) |
| Anonymous story viewing | No | Yes (paid) |
| Unfollower tracking | Yes | Yes (paid) |
| Free tier | Yes | Very limited |
| iOS | Yes | Yes |
| Track record | 100K+ downloads | ~15K downloads |
Which Should You Choose?
Choose Radarrr if recent follow tracking and push notifications are your primary need and you want to get started without hitting a paywall. Radarrr's free tier lets you actually use the app before deciding whether to upgrade.
Choose Katch if you want anonymous story viewing bundled in, or you prefer the idea of local data fetching and are happy to pay upfront for a broader feature set.
Frequently Asked Questions
What is the Katch app? Katch is an Instagram follow tracker that lets you see who someone recently followed, track unfollowers, and view stories anonymously. A premium subscription is required to access most features.
Is the Katch app free? Katch has a free download but the core features require a paid subscription. Radarrr offers a more accessible free tier for basic recent follow tracking.
Is there a Katch app alternative? Yes — Radarrr is a direct Katch alternative for iOS and Android. It offers recent follow tracking and push notifications with a free tier, without requiring an upfront subscription.
Does Katch work on Android? Yes, Katch is available on both iOS and Android.
Looking for a Katch alternative that's free to try? Download Radarrr — no subscription required to get started.