LetraInstaller

LetraInstaller can be installed on compatible iPhones and iPads running iOS 15 or later.

There are two main installation workflows: Apple ID signing with LocalDevVPN and Ad Hoc signing through TrollStore.

How to download and install LetraInstaller

1. Open Settings → General → About on your iPhone.
2. Check your iOS version and device model.
3. Visit the official CokePokes/LetraInstaller GitHub repository.
4. Open Releases.
5. Select the latest release, v0.4.7-1.
6. Download the available letrainstaller.ipa or compatible .tipa file.
7. Save the package to Files.
8. Open TrollStore or another compatible installer.
9. Import the downloaded LetraInstaller package.
10. Complete installation using your supported method.
11. Enable Developer Mode if required by your installation method.
12. Open LetraInstaller.
13. Review its settings and available signing methods.
14. Configure Apple ID signing or TrollStore installation.
15. Import a compatible IPA and begin using LetraInstaller.

How to sign an IPA using your Apple ID

1. Open LetraInstaller.
2. Tap the account icon.
3. Sign in using your Apple Account through the app's signing workflow.
4. Complete two-factor authentication if Apple requests it.
5. Allow LetraInstaller to prepare the required development certificate and provisioning profile.
6. Tap Choose IPA.
7. Select an IPA from Files.
8. On the Configure screen, choose Apple ID signing.
9. Review the application's details and required permissions.
10. Tap Sign.
11. Wait for signing to finish.
12. Select Install with LocalDevVPN if pairing has already been configured.

For free Apple Accounts, installed apps normally require re-signing after seven days.

How to set up LocalDevVPN

LetraInstaller uses LocalDevVPN to install Apple ID-signed applications through the iPhone's own developer services.

For the documented workflow, you normally need a computer once to generate a pairing file.

1. Install a supported pairing utility on a Windows, macOS or Linux computer.
2. Connect your iPhone or iPad using USB.
3. Unlock your device and tap Trust when prompted.
4. Generate the required pairing file.
5. Transfer it to your iPhone using a secure method.
6. Open LetraInstaller.
7. Go to Settings → Import Pairing File.
8. Select the pairing file.
9. Enable LocalDevVPN when required.
10. Return to the signed IPA.
11. Choose Install with LocalDevVPN.

Pairing on iOS 17.4 or later

The developer documents a newer RPPairing workflow for iOS 17.4 and later.

Use a compatible version of idevice_pair to generate the required pairing information.

You may also need to enter your device UDID manually.

Version 0.4.7-1 improves support for RPPairing files and fixes an installation issue affecting these firmware versions.

How to install an IPA using TrollStore

1. Confirm that your iOS version supports TrollStore.
2. Open LetraInstaller.
3. Choose IPA.
4. Select the file you want to install.
5. On Configure, select Ad Hoc.
6. Apply any supported changes.
7. Tap Sign.
8. Choose Install with TrollStore.
9. Complete installation in TrollStore.

TrollStore is not available on every iOS version.

How to inject a tweak into an IPA

1. Open LetraInstaller.
2. Import a compatible IPA.
3. Open the Configure screen.
4. Enable Tweak Injection.
5. Import your .dylib or .deb file.
6. Review the tweak's requirements.
7. Choose which extensions and resources to retain.
8. Sign the modified application.
9. Install it through your configured installation method.
10. Test the application before adding another tweak.

Only modify apps you own or are authorized to modify.

How to refresh installed apps

Open LetraInstaller → Apps.

Select the application and tap Resign & Reinstall.

LetraInstaller uses the saved IPA to renew its signing profile.

How to get an IPA through Telegram

1. Open LetraInstaller.
2. Select Get IPA from Telegram.
3. Sign in through the integrated Telegram workflow.
4. Paste a supported App Store link.
5. Select Get IPA.
6. Wait for the package to become available.
7. Review it before signing.

The Telegram feature relies on a bot-based service. Do not assume every app delivered through it is authorized for redistribution or safe to install.

Important safety advice

Treat Apple Account credentials, developer certificates and pairing files as sensitive information.

A pairing file can authorize privileged device communication. Keep it private and never upload it to an unknown signing website.

The developer offers optional Apple Account credential storage in the iOS Keychain, but users should still evaluate account-security risks before enabling it.

LetraInstaller combines IPA signing, installation, tweak injection and app management.

On-Device IPA Signing

Sign compatible IPA files directly on an iPhone or iPad.

Free Apple Account Support

LetraInstaller can use Apple's free Personal Team signing method.

Paid Developer Account Support

It also supports eligible paid Apple Developer accounts.

Development Certificate Creation

The application can request development certificates and provisioning profiles through Apple's services.

Device Registration

LetraInstaller can use the device UDID during provisioning.

Ad Hoc Signing

Prepare compatible packages for TrollStore.

TrollStore Integration

Send Ad Hoc packages directly to an eligible TrollStore installation.

LocalDevVPN Installation

Install Apple ID-signed applications through LocalDevVPN after setting up the appropriate device pairing.

RPPairing Support

Version 0.4.7-1 supports newer remote pairing files for iOS 17.4 and later.

Manual UDID Entry

The latest release adds an option to enter a device UDID manually.

IPA Import

Select an IPA directly from the iOS Files app.

Dylib Injection

Add compatible dynamic libraries to an application before signing.

DEB Package Injection

Import compatible .deb packages and extract their supported contents.

Tweak Resource Bundles

LetraInstaller includes relevant resource bundles from supported tweak packages.

App Name Editing

Change the display name of a compatible app before installation.

Bundle Identifier Editing

Modify the bundle identifier when supported.

Changing the identifier can break login, keychain access, extensions or other app features.

Version Editing

Change supported application version metadata before signing.

Entitlement Management

Keep an IPA's embedded entitlements or choose another compatible entitlement configuration.

Entitlements still need to be permitted by the signing profile.

App Extension Management

Keep, remove or select individual extensions.

Extension Signing

Sign retained extensions through the supported profile workflow.

Version 0.4.7-1 fixes a signing bug that caused some extensions to be skipped.

App Library

Store previously installed app packages for later management.

Resign and Reinstall

Renew compatible applications before their development profiles expire.

Seven-Day Expiration Management

Apps signed with free Apple Accounts normally expire after seven days.

Optional Keychain Credential Storage

LetraInstaller can optionally store Apple Account credentials in the device Keychain to assist with subsequent signing sessions.

Telegram Integration

Retrieve supported app packages through an integrated Telegram workflow.

Automatic Updates

LetraInstaller checks for newer releases and offers update information inside the app.

Install Already-Signed IPA

Import a compatible signed IPA and use the available installation method without signing it again.

App Deletion

Version 0.4.7-1 introduces an application deletion option.

The developer specifically notes uncertainty about its functionality on iOS 27.

Supported iOS Versions

1. iOS 15: Meets the documented minimum.
2. iOS 16: Meets the documented minimum.
3. iOS 17.0–17.3: Uses the older pairing workflow.
4. iOS 17.4: Requires the newer pairing workflow.
5. iOS 18: Within the documented minimum range; installation depends on pairing and signing.
6. iOS 26: Requires compatible modern device pairing.
7. iOS 27: Full compatibility is not independently established; the developer flags app deletion as uncertain.

Supported Devices

LetraInstaller targets compatible iPhones and iPads.

Each device must also meet the requirements of its chosen installation method.

Free Apple Account Limitations

Apple's free development signing normally has a seven-day application expiration and a three-active-app restriction.

App ID registration limits may also apply.

TrollStore Limitations

TrollStore supports only specific firmware versions.

Ad Hoc signing does not make TrollStore available on unsupported devices.

Tweak Injection Limitations

Not every jailbreak tweak works inside a sideloaded IPA.

Some tweaks require a jailbreak daemon, privileged system access or frameworks unavailable in an ordinary sandbox.

Important Security Limitations

LetraInstaller does not jailbreak the device.

It does not universally remove app sandbox restrictions or unlock unsupported Apple entitlements.

Modifying an IPA can also break its original signature, app extensions or server-based authentication.

Use trusted packages and keep backups before replacing important applications.