Flowly – a macOS app that brings smooth, fluid scrolling to any mouse

Name: Flowly – a macOS app that brings smooth, fluid scrolling to any mouse
Availability: InStock
Author: simonij

by simonij·Mar 2, 2026·3 points·1 comment

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AI Analysis

●●SolidSolve My ProblemCozy

System-wide smooth scrolling for any mouse, but macOS trackpads already beat it.

Strengths

•Solves a real, specific friction point (macOS + external mouse = laggy scroll) with physics-based smoothing rather than naive interpolation.
•Per-app toggle is thoughtful UX—users can disable in apps where standard scrolling is expected.
•Lightweight (>1% CPU, 20MB) and ships with real social proof (4.9/5, 2K+ users, 500+ reviews).

Weaknesses

•The core problem is niche: trackpad users (majority) never hit this pain. External mouse + macOS is a small subset.
•Exists in a category where the OS itself (Apple) could close this gap in one release, making it vulnerable to obsolescence.

Post Description

Hey HN! I built Flowly, a macOS utility that brings smooth, fluid scrolling to any external mouse. If you've ever used a third-party mouse on Mac, you know the pain. macOS gives trackpads beautiful inertial scrolling, but external mice get choppy/laggy, line-by-line movement. Flowly fixes this by intercepting scroll events and applying smoothing to create natural, fluid motion across every app.

· Works system-wide with any mouse (Logitech, Razer, etc.) · Per-app control: enable/disable smoothing per application · Customizable smoothness and speed · Lightweight: <1% CPU, ~20MB memory · macOS 12+ (Monterey through Sequoia)

Would love to hear your feedback! This is my first MacOS app also

https://flowlyapp.dev