# SlopeReader — Slope Measurement for Golf > iPhone app for precise golf green slope measurement using Aimpoint Express. (iPhone/iPad app by Stephen Lee.) - Source: https://appshunter.io/ios/app/slopereader/id6755605118 (this page in markdown: same URL + `.md`) - Developer: [Stephen Lee](https://appshunter.io/developer/1854830513) - Category: Sports, Utilities - Price: Free - Rating: 5.00/5 from 3 App Store ratings - Age rating: 4+ - Requires: iOS 17.6 · 9 MB - Languages: English - Released: 2025-11-23 - Data updated: 2026-06-01 - Monetization: free - User reviews in markdown: https://appshunter.io/ios/app/slopereader/id6755605118/reviews.md ## What is SlopeReader? SlopeReader transforms your iPhone into a precision slope measurement tool designed specifically for golfers who use the Aimpoint Express green reading system. MEASURE SLOPE WITH PRECISION Place your phone flat on the green and instantly see the slope in real-time. The intuitive bubble level interface shows both forward/backward slope (pitch) and left/right slope (roll) with directional arrows pointing downslope. Perfect for: • Learning what different slope percentages feel like • Validating your green reading on practice greens • Building muscle memory for Aimpoint Express stances • Understanding break on challenging greens KEY FEATURES • Real-Time Bubble Level: Visual feedback with a moving bubble that shows slope direction and magnitude • Multiple Units: Switch between Percent (default), Degrees, and Radians • Smart Calibration: Account for your phone case or camera bump - calibrate once and it remembers • Directional Indicators: Color-coded arrows show which way the green slopes • Completely Offline: No internet required, works anywhere on the course • Always-On Display: Screen stays active while measuring slopes • Instant Readings: 60Hz sensor updates for smooth, responsive measurements HOW IT WORKS 1. Place your iPhone flat on the green at your ball position 2. Wait for the bubble to stabilize 3. Read the slope percentage and direction from the display 4. Use with your Aimpoint Express technique to find your aim point The calibration system ensures accurate readings even with a phone case. Simply calibrate on a known level surface once, and the app remembers your offset. PERFECT FOR PRACTICE Use SlopeReader on the practice green to: • Feel what 1%, 2%, 3% slopes actually feel like with your feet • Verify your slope reading accuracy • Build confidence in your green reading before competition • Train your perception to match reality DESIGNED FOR GOLFERS Built by golfers, for golfers. Simple, focused, and designed for real-world use on the course. No accounts, no subscriptions, no ads - just a tool that works. Whether you're learning Aimpoint Express or refining your green reading skills, SlopeReader gives you the precise measurements you need to improve your putting. Download SlopeReader and start reading greens like a pro. ## Key features - Real-time bubble level for slope visualization - Multiple units: Percent, Degrees, Radians - Smart calibration for phone cases - Directional indicators for slope direction - Completely offline functionality - Always-on display for continuous measurement - Instant 60Hz sensor updates ## Frequently asked questions about SlopeReader ### Does SlopeReader have ads? No, SlopeReader is completely ad-free. The app is designed to be a focused tool for golfers without any advertisements. ### What devices does SlopeReader support? SlopeReader is available for iPhone and iPad. It utilizes the device's sensors to provide accurate slope measurements. ### How often is SlopeReader updated? The latest version, 2.1, was released on April 10, 2026. Updates are released periodically to improve functionality and add features. ### Can SlopeReader be used without an internet connection? Yes, SlopeReader is completely offline and does not require an internet connection. This allows you to use it anywhere on the golf course. ### What is the age rating for SlopeReader? SlopeReader has an age rating of 4+. This indicates it is suitable for users of all ages. ### How does SlopeReader's calibration work? SlopeReader features smart calibration that accounts for phone cases or camera bumps. You calibrate it once on a level surface, and it remembers your offset for accurate readings. ### What makes SlopeReader useful for practice? SlopeReader helps golfers feel different slope percentages, verify their green reading accuracy, and build muscle memory for Aimpoint Express stances, all on the practice green. ### What is the user sentiment for SlopeReader? SlopeReader has received overwhelmingly positive feedback, indicated by its perfect 5.0-star rating from 3 reviews. ## Version history (last 4 releases) ### 2.1 — 2026-04-10 Friendly pointer to our companion app "Better Golf Practice" which has the same free functionality plus guided practice with green reading, putting, wedges, and full swing. ### 2 — 2025-11-24 Enhanced phone case and camera bulge calibration on ANY surface. Improved visuals and UX. ### 1.1 — 2025-11-24 Bug fixes and improvements to the landscape measurement. ### 1.0 — 2025-11-23 No release notes. ## More apps by Stephen Lee - [Better Golf Practice](https://appshunter.io/ios/app/better-golf-practice/id6757390582) All apps by Stephen Lee: https://appshunter.io/developer/1854830513 ## Related topics [percent slope](https://appshunter.io/ios/topics/percent-slope) --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-01.*