Comparison

Green Slope vs Windy Golf

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Green Slope

This training aid helps golfers visualize and understand putts by measuring green slope and predicting break. It uses device sensors to assess orientation and attitude, then provides graphical overviews and adjustable aimpoint tables.

Highlights
  • Measures green slope
  • Predicts putt break and aimpoint
  • Adjustable aimpoint tables
  • Graphical overviews of putts
  • Uses device motion sensors
  • Configurable green speed and pin direction
Features
Read full description

"Green Slope" measures the slope and then predicts the break and aimpoint required for a putt. It's intended as a training aid, providing assistance with visualization and understanding of putts. Set the green speed, select pin direction, place the device on ground for three seconds, and read your putt. Using the internal iPhone and iPad motion sensors to assess the device orientation and attitude, the App measures slopes across and along the line of the putt. The estimated Fall Line direction and slope are then used to predict the likely break. Standard 'Aimpoint', 'Plays As', 'Fingers' and other tables are available from the menu. These can be adjusted for slopes, Stimp, past hole distance, and other parameters. The app then provides graphical overviews of selected putts with optional configurations. Since many phones have one or more camera lenses on the back preventing accurate slope measurements, Green Slope has been designed to be used with the phone is face down or face up on the green. Comprehensive help on app use is available from the menu button.

About

Windy Golf

This app provides real-time wind calculations and GPS data to help golfers adjust their shots and lower scores. It features dynamic wind adjustments, a live activity tracker, and score history synchronization. Choose your preferred units and weather sources for a personalized experience.

Highlights
  • Dynamic wind calculations
  • Real-time compass
  • Lightweight GPS for distance measurement
  • Score history synchronization
  • Manual wind adjustment
  • Live activity tracker
  • Imperial/Metric unit options
Read full description

A real-time wind caddie in your pocket helps you lower scores and take the mystery out of wind! * Get dynamic wind calculations to calculate accurate yardage adjustments. Save strokes off every round played in windy conditions. * Real time compass calculates wind adjusted distance on the fly. * Free GPS maps available for many golf courses. * Stats dashboard helps spot areas for game improvement. * Keep score for every round and maintain complete score history sync'd to your iCloud account. * Option to manually adjust wind direction and speed. * A live activity tracker on your lock screen provides up to date information and quick access to the app. * Choose between Imperial and Metric units for distances and wind speed. * For advanced users, you can also choose from a variety of weather sources and favorite weather stations near you. * An iOS widget displays wind information from your favorite weather stations. TERMS OF USE: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Green Slope4 screens
Windy Golf4 screens

Verdict

The call

The clearest difference is price: Windy Golf at Free against Green Slope's $9.99. Green Slope's advantage is in-app purchases (none vs 3). On rating, ratings volume, update cadence and ads there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Windy Golf is free to download; Green Slope costs $9.99 up front. Windy Golf sells 3 in-app purchases, starting at $0.99 per month. Green Slope asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 5.0 for Green Slope against 5.0 for Windy Golf. Both are backed by a comparable volume of ratings — 2 and 1 respectively.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly every 2 weeks. The most recent releases landed on August 17, 2026 and September 22, 2026 respectively.

Scorecard3 real differences · 7 level
Green Slope versus Windy Golf: the parameters behind the verdict, then further details
ParameterGreen SlopeWindy Golf
Price$9.99Free — better
Rating5.0 (2 ratings)5.0 (1 ratings)
Positive reviews100.0% of reviews—
Number of ratings2 — better1
Update frequencyEvery 2 weeksEvery 2 weeks
AdsNoNo
In-app purchasesNo — betterYes
MonetizationPaidFree with in-app purchases — better
DevicesiPhone, iPadiPhone, iPad
Requires iOS17.617.0 — better
Further details — not scored
Size7 MB16 MB
Age rating4+4+
DeveloperGordon ThomsonHormazd Romer

Customer experience

Green Slope

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews2 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Windy Golf

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Green Slope

No in-app purchases

3 purchases

Windy Golf

Subscriptions2
  • Monthly$0.991 Month
  • Birdie Annual1 Month trial$6.991 Year
One-time1
  • Lifetime$129.00

Questions

Is Green Slope free?
Green Slope costs $9.99, with no in-app purchases.
Is Windy Golf free?
Windy Golf is free to download, with in-app purchases available.
Which has better reviews, Green Slope or Windy Golf?
Green Slope and Windy Golf are both rated 5.0 out of 5 on the App Store, from 2 and 1 ratings respectively.
Do Green Slope or Windy Golf have ads?
Neither Green Slope nor Windy Golf shows ads.
Which is updated more often, Green Slope or Windy Golf?
Green Slope ships an update every 2 weeks, and Windy Golf every 2 weeks. Most recently, Green Slope was updated on August 17, 2026 and Windy Golf on September 22, 2026.

Other comparisons