# In/Out Tennis

> Companion app for a tennis line calling device. (iPhone/iPad app by Gregoire Gentil.)

- Source: https://appshunter.io/ios/app/inout-tennis/id1298138902 (this page in markdown: same URL + `.md`)
- Developer: [Gregoire Gentil](https://appshunter.io/developer/1298138901)
- Category: Sports
- Price: Free
- Rating: 2.40/5 from 5 App Store ratings · 3 written reviews indexed
- Age rating: 4+
- Requires: iOS 9.0 · 5 MB
- Languages: American English
- Released: 2017-10-21
- Data updated: 2026-06-01
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/inout-tennis/id1298138902/reviews.md

## What is In/Out Tennis?

Tired of asking your tennis opponent: "are you really sure?" In/Out has the solution: install an In/Out device in seconds on any court and get line calling challenges like the pros.

This app is the Companion app of the In/Out device.

## Key features

- Professional line calling challenges
- Easy device installation
- Companion app functionality
- Enhances match fairness
- Court-side accuracy

## Recent user reviews (3 of 3)

All indexed reviews: https://appshunter.io/ios/app/inout-tennis/id1298138902/reviews.md

### 1/5 — Don’t buy

*2024-06-23*

This is a no go. Poor product, poor support.  Update is no good,never worked, just plain rip off.  Simple as that.

### 5/5 — The phone app works great, need watch app.

*2020-10-07*

So far the application runs great on my phone. However I could see tremendous benefit from having the same functionality on my watch. I can take a quick glance at my watch between serves our points.
Please release an Apple Watch companion app!

### 4/5 — So far, it shows promise

*2018-01-05*

I’ve been following In/Out when this was just an idea. Happy to say, it shows tons of promise. With the obvious bugs that will plague this app and the In/Out device, I’m very excited to see the continued development of this app and the In/Out device. I’ve seen great improvements in just these few recent updates. Thank you for the hard work and dedication! Please continue improving the apps and the device. Hopefully we’ll have some great improvements before Springtime, when tennis starts to go full-swing.

## Frequently asked questions about In/Out Tennis

### Does In/Out Tennis have ads?

No, In/Out Tennis does not contain advertisements.

### What is the rating for In/Out Tennis?

In/Out Tennis has a rating of 2.4 stars based on 5 user ratings.

### Is In/Out Tennis free to download?

Yes, In/Out Tennis is available for free download.

### What devices support In/Out Tennis?

In/Out Tennis is supported on iPhone, iPad, and iPod devices.

### When was In/Out Tennis last updated?

The latest version of In/Out Tennis was updated on June 20, 2018.

### What is the age rating for In/Out Tennis?

In/Out Tennis has an age rating of 4+.

### How does In/Out Tennis improve gameplay?

In/Out Tennis provides professional-level line calling challenges, ensuring greater accuracy and fairness during matches, similar to how pros play.

## Version history (last 5 releases)

### 2018.06.07 — 2018-06-20

This app has been updated by Apple to display the Apple Watch app icon.

Minor fixes to improve the authentication process

### 2018.06.06 — 2018-06-15

Update the Companion App to be compatible with the new In/Out cloud.

### 2017.12.21 — 2017-12-22

Synchronization of stats session is more reliable.
Button save all has been added.
Screen mirroring is improved - firmware upgrade of the device (>2017-12-05) is needed for improved mirroring.

### 2017.11.11 — 2017-11-17

Improve the firmware upgrade mechanism for the device
Avoid the screen to timeout (which generated problems of communication with the device)
Fix problem in the login and registration pages
Other fixes

### 2017.10.25 — 2017-10-29

Various minor fixes
Correct version number (as a date)

## Apps similar to In/Out Tennis

| App | Rating | Price | Category |
| --- | --- | --- | --- |
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| [Acemate Tennis](https://appshunter.io/ios/app/acemate-tennis/id6743368519) | — | Free | Sports |
| [Picklebay](https://appshunter.io/ios/app/picklebay/id6748446794) | — | Free | Sports |
| [Perform-UP Tennis](https://appshunter.io/ios/app/perform-up-tennis/id1611170308) | — | Free | Sports |
| [Tennibot](https://appshunter.io/ios/app/tennibot/id1438424530) | 4.8 (6) | Free | Sports |
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## More apps by Gregoire Gentil

- [In/Out Sport](https://appshunter.io/ios/app/inout-sport/id6471904224)

All apps by Gregoire Gentil: https://appshunter.io/developer/1298138901

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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 2026-06-01.*