# GREEiN

> Golf putting aid for instant grain and slope analysis. (iPhone/iPad app by Techno Craft Co., Ltd..)

- Source: https://appshunter.io/ios/app/greein/id1072675851 (this page in markdown: same URL + `.md`)
- Developer: [Techno Craft Co., Ltd.](https://appshunter.io/developer/963629745)
- Category: Sports
- Price: $0.99 with in-app purchases
- Age rating: 4+
- Requires: iOS 9.0 · 31 MB
- Languages: American English, Japanese
- Released: 2016-03-15
- Data updated: 2026-08-29
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/greein/id1072675851/reviews.md

## What is GREEiN?

GREEiN Golf Putting Grain and Slope Reader

GREEiN, the app that gives instant info on grain and slope
Now get your grain reading in just ONE second!
Easier to use than ever before, GREEiN is sure to help your score!

Even pros admit that it’s difficult to read both the slope and the grain.
But with the new putt training app GREEiN, it’s a snap!

GREEiN has 3 easy-to-use functions:
GRAIN reader shows the roughness and direction of the grain!
SLOPE reader shows the degree and direction of the slope!
PUTT reader shows both, all at once!

All golfers who want to improve their score,
Everyone who wants to train their green reading skills,
GREEiN is the perfect app for you!
Enjoy golf even more with GREEiN!

This application was developed using open CV technology.

◎About the Functions
GRAIN reader:
Just take a photo of the green from knee-height with your smartphone facing towards the cup, and GRAIN reader will give you a reading for both the roughness and direction of the grain. Your result is visually displayed with easy-to-understand arrows showing direction. The number of arrows indicates the roughness of the grain in 3 levels.

SLOPE reader:
Just place your smartphone on the green facing towards the cup and SLOPE reader will give you a reading for both the degree and direction of the slope. Your result is visually displayed with easy-to-understand arrows showing direction. The degree of slope is indicated up to 21 degrees, by number and color.

PUTT reader:
Use both GRAIN reader and SLOPE reader all at once! Just perform the necessary steps for using each function at a single spot on the green and PUTT reader will give you a simultaneous reading for both slope AND grain! PUTT reader can give you just the hint you need to help predict how the condition of the green will affect your putting.


Compatible devices
iOS 9.0 and higher

## Key features

- Instant grain reading
- Slope analysis
- Combined putt reader
- Visual direction arrows
- Grain roughness levels
- Slope degree and color indication

## Pricing and in-app purchases

Base price: $0.99.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| 30 day TICKET | $2.99 | one-time |
| 1 year TICKET | $29.99 | one-time |


## Recent user reviews (10 of 20)

All indexed reviews: https://appshunter.io/ios/app/greein/id1072675851/reviews.md

### 1/5 — 返金お願いします。

*2024-12-15*

作動しません。

### 1/5 — 返金お願いします

*2018-10-08*

アプリ起動後何も起きません。
返金お願いします

### 1/5 — これは詐欺もいいところ

*2018-01-18*

確かに機能は、凄く良い。しかし、120円がインストール代と30日間お試し代。まさかのその後は月360円かかる。芝を読む機能は有料でも良いと思うが、斜度を測る機能くらい無料で使わせて欲しかった。今度のコンペが終わったら消そうと思います。気分的には騙された感じで残念です。

### 1/5 — まったく使えません

*2017-09-11*

ネットワークの状態を確認して下さい、と出てまったく使えません。返金を求めます！

### 1/5 — 120円返せ

*2017-08-18*

アプリインストールしたが、ネットワークの状態をご確認して下さい。と出て、何も出来ない！ お金だけ取られてる。最悪！！

### 1/5 — 使えません！

*2017-07-14*

ネットワークが、、
メッセージ出て使えません！

有料なのに、、

### 1/5 — 早く何とかして

*2017-07-10*

全く動きませんけど？
動かないんだったらお金返して

### 1/5 — ネットワークを確認？

*2017-07-01*

動きません😡もう二度と購入しません。がっかりです😞

### 1/5 — ネットワーク？

*2017-06-17*

動かないですけど？

### 1/5 — クラウド使わないので使えない

*2016-10-08*

120円という安さで飛びついてしまったが、アプリ内で課金があるのはショックでした。
また、クラウドは必須らしく、使わないので使うことが出来ない。クラウド必要？意味が分からないので、即、削除。

## Frequently asked questions about GREEiN

### How does GREEiN read the grain on a golf green?

GREEiN's GRAIN reader function analyzes a photo of the green taken from knee-height. It then visually displays the direction and roughness of the grain using arrows, with the number of arrows indicating roughness in three levels.

### What information does GREEiN provide about the slope?

The SLOPE reader function measures the degree and direction of the slope by placing your smartphone on the green. It displays this information with easy-to-understand arrows and color coding, indicating slopes up to 21 degrees.

### Can GREEiN read both grain and slope at the same time?

Yes, the PUTT reader function combines both GRAIN and SLOPE readers. By performing the necessary steps at a single spot, it provides a simultaneous reading for both slope and grain to help predict putt behavior.

### What devices is GREEiN compatible with?

GREEiN is compatible with iOS 9.0 and higher and is supported on iPhone and iPod devices.

### How often is GREEiN updated?

The app was last updated on February 20, 2024, with the latest version being 1.170. This indicates regular maintenance and potential feature additions.

### What is the price of GREEiN?

GREEiN is a paid application, available for a one-time purchase of $0.99.

### Does GREEiN have ads?

No, GREEiN does not contain advertisements. It is a paid app focused on providing its features without interruption.

### What technology is GREEiN developed with?

GREEiN was developed using open CV technology, which is a library of programming functions mainly aimed at real-time computer vision.

## Version history (last 5 releases)

### 1.170 — 2024-02-20

v1.170
Bug Fixes

### 1.160 — 2022-05-10

Addition of Golf Station function

### 1.150 — 2022-02-28

Change app icon

### 1.140 — 2021-09-17

Deprecated camera library replacement

### 1.130 — 2021-04-07

Fixed a bug in the back button

## Apps similar to GREEiN

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## More apps by Techno Craft Co., Ltd.

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- [ゴルフはAi CADDY Golf GPS Navi](https://appshunter.io/ios/app/ai-caddy-golf-gps-navi/id1474925058)
- [comyunavi busnavi](https://appshunter.io/ios/app/comyunavi-busnavi/id1477923218)

All apps by Techno Craft Co., Ltd.: https://appshunter.io/developer/963629745

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*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 2026-08-29.*