Why only red arrows, though?
I’d love to be able to use these stickers to highlight things in texts from friends of mine, but the fact that these are all red makes it look like I’m a teacher with her red pen or something.

Archived App
This is an archived listing of the app previously available on the App Store.Enhance your iMessage conversations with a variety of arrow stickers. Easily peel, place, and send these stickers on images, text bubbles, or as standalone messages. You can even rotate and resize them for creative expression.
1.0
October 5, 2016
This app has been updated by Apple to display the Apple Watch app icon.
Once installed, open your iMessage app, tap the App Store icon, and select Arrows. You can then tap on a sticker to send it, or peel and place it on images or text bubbles within your conversation.
Yes, you can rotate and enlarge Arrows stickers. Hold down a sticker in the iMessage conversation, then use a second finger to rotate it or pinch to zoom and change its size.
Arrows is compatible with iPhone, iPad, and iPod devices, allowing you to enhance your iMessage conversations across Apple devices.
Arrows has an age rating of 4+, making it suitable for younger users and families to express themselves in messages.
Arrows is a paid app, available for a one-time purchase of $0.99. There are no in-app purchases or subscriptions required.
Arrows was last updated on October 5, 2016, with version 1.0. It was initially released on the same date.
The provided data does not specify if Arrows contains advertisements. However, it is a paid app, which often indicates an ad-free experience.
Arrows has an average rating of 3.5 stars, based on 2 user ratings. This suggests a generally positive but mixed reception from its users.