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Download letrainstaller.ipa (or .tipa) from the latest release.
Install Letra IPA on iOS 15.0 or later with TrollStore or your preferred sideloading method.
↓ Download Letra IPADownload letrainstaller.ipa (or .tipa) from the latest release.
Open it with TrollStore, or sideload it with your preferred method.
Launch Letra.
Open the sign and install guide to choose an IPA file, configure signing, and install it.
How to Sign and Install IPA Files with Letra →