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Scarlet is a free third-party IPA sideloading platform for iOS devices. Essentially, it acts as an alternative third-party app distribution channel that replaces the official App Store, allowing users to download and install apps and games that are not available on the official store. It also supports developers to self-sign and sideload their own IPA files, and it works without requiring a jailbreak.
Scarlet's core features fall into four main categories: IPA signing & installation, app resource distribution, certificate & account management, and app backup & restore. It lets users sign and install IPA files with a personal Apple ID or their own developer certificate, comes with a built-in trusted source repository for users to browse and download apps, and offers two backup & restore options: regular and invisible. It is compatible with all major iOS versions from iOS 10 to iOS 16, and works with all iPhone and iPad models.
As for pricing, the Scarlet app itself is 100% free, with no subscriptions or usage fees of any kind. Only some third-party apps hosted on the platform may require separate payment from users.
Pros
Scarlet works without jailbreaking your device, so it does not void Apple's official warranty. Its completely free model lowers the barrier to entry, and it supports custom certificate import, catering to the different needs of regular users and developers alike. The backup & restore feature also adds to its overall practicality.
Cons
Apple enforces strict regulations on third-party signing certificates, so Scarlet's certificates frequently face revocation risk. You will need to wait for an update after a certificate expires. Additionally, users need to evaluate the safety of app sources on their own, as the platform does not provide a full guarantee for them.
It is ideal for iOS users who need to install apps unavailable on the App Store, and iOS developers who need to test their own apps. It cannot be installed and used normally directly in mainland China: a proxy network is required to access it, and certificates have particularly poor stability there.
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