App reinstall
I also have app crash issue but removed the app then reinstall it fixed the problem. In general, this is a good app with enough options to print.
App crashes
App crashes won’t work

Archived App
This is an archived listing of the app previously available on the App Store.Design and print custom labels from your phone using a Bluetooth-connected pocket printer. Offers various fonts, borders, templates, and the ability to add text, barcodes, and QR codes. Supports offline use and DIY printing for enhanced efficiency.
1.1.4
March 15, 2023
Bug fixes and improvements.
Polono is available for iPhone and iPod devices. It connects to your printer via Bluetooth on your phone.
Yes, Polono supports offline printing. You do not need to be connected to the internet to design and print your labels.
You can freely insert and edit text, one-dimensional codes (barcodes), two-dimensional codes (QR codes), borders, and dates/times on your labels.
Yes, Polono comes with built-in multiple industry label templates that can be easily customized. This helps save time and improve work efficiency.
Polono has an age rating of 4+, making it suitable for a wide range of users.
The latest version of Polono is 1.1.4, and it was last updated on March 15, 2023. Updates typically bring new features and improvements.
Polono has a user rating of 3.8 stars based on 4 ratings. This indicates a generally positive but mixed user reception.
The provided data does not specify if Polono contains advertisements. However, it is listed as free with no in-app purchases.