An image annotation tool to label images for bounding box object detection and segmentation.

Key features:
Draw bounding box, polygon, cubic bezier, line, and point
Draw keypoints with a skeleton
Label pixels with brush and superpixel tools
Automatically label images using Core ML models
Settings for objects, attributes, hotkeys, and labeling fast
Read and write in PASCAL VOC XML format
Export to YOLO, Create ML, COCO JSON, and CSV formats
Export index color mask image and separated mask images
Augment images, resize images, video to frames, etc.

The details are described on our support page.


Title of service: Full App(1 Month)
Length of free trial: 3 days
Length of subscription: 1 month
Price of subscription: $2.99/month

Title of service: Full App(1 Year)
Length of free trial: 3 days
Length of subscription: 1 year
Price of subscription: $9.99/year

Payment will be charged to your Apple ID account after the 3 days free trial.
Subscription automatically renews unless it is canceled at least 24 hours before the end of the 3 days free trial.
Your account will be charged for renewal within 24 hours prior to the end of the 3 days free trial.
You can manage and cancel your subscriptions by going to your account settings on the App Store after purchase.
Any unused portion of a free trial period, if offered, will be forfeited when the user purchases a subscription to that publication, where applicable.

Privacy policy:

Terms of Use:

Post the problem to our Github issues page.

Have questions?
Send an email to

Thank you.

What’s New

Version 3.08.2

Added "Show keypoints boxes" to hotkeys.
You can edit the bounding box for each keypoints object.
The bounding box is exported to COCO JSON file as bbox.

Ratings and Reviews

3.5 out of 5
37 Ratings

37 Ratings

Innov8now ,

Very good software but needs export customization to make perfect

I was there was a way to customize export options, for example how to layout the columns and how to format the coordinates of bounding boxes. I always have to open in excel and do complex methods to calculate image pixel dimensions then subtract RectLabel coordinates to get the correct coordinates I need for TF, Keras and OpenCV training.

Developer Response ,

Thanks for your review.

Currently the CSV format is for Turi Create.
Could you show us the format which is used on TF, Keras and OpenCV training?

For TF, we are providing a sample python code to convert to the TFRecord file.

Hazeo ,

Developer is deceptive and greedy

I echo other reviewers’ anger on the developer’s deception and greed, and cannot recommend this despite it being a simple but useful program.

We are forced to pay a 'new full price’ on an app we had purchased in order to continue using it. Us early adopters helped you by pushing the app up on the rankings, and making us pay more for using the same features is very poor practice. This is like buying a product on sale, then later asked to pay the full price. With my own iOS app which I increased price over time I DID NOT ask existing users to pay more. Loss of revenue is completely acceptable in this case.

If you want to charge for continued development, which is understanable, make new features as an in-app purchase without forcing existing users to pay more to use features they had access to before. This is very deceptive.

Developer Response ,

If you bought RectLabel before starting in-app purchase, you can ask us to send the version 1.96 which is just before the in-app purchase.
At first, restore purchase from app menu to make the app purchase receipt in your app to the latest one.
Then, zip and send RectLabel app(/Applications/ to
We would check the original app version which you bought, the transaction id for your payment, and the date when your app purchase receipt was updated.
If we could confirm, we would send the version 1.96 to you.

Before launching the version 1.96, be sure to "Export settings file for the old version" from app menu.
Otherwise when you launch the version 1.96, the current settings file would be cleared because the old version cannot read the current format.
Import the exported settings file after you launch the version 1.96.

The new update version 2.58 was released.

bw4sz ,

Friendly Support

There have been some negative reviews on the app because of the change in price model. I've been using the tool for a year and found it extremely helpful and reliable. Worth the money, even if they charged you 1$ at first. Not a big deal. I can also say that i've twice submitted issues on the github repo and the developers were quick to add features.

App Privacy

The developer, Ryo Kawamura, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy.

Data Not Collected

The developer does not collect any data from this app.

Privacy practices may vary, for example, based on the features you use or your age. Learn More


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.