What's the best iOS app for installing IPA files directly on an iPhone without a computer?

IPA Installer is an iOS utility focused on installing IPA files directly onto iPhones and iPads, catering to users who need to sideload apps or test development builds outside the App Store. For scenarios like installing a custom Roblox executor or a beta application, this app streamlines the process by letting users import files from cloud services or local storage. Its straightforward interface and quick operation are frequently praised in reviews, with many noting it works reliably when files are correctly prepared. However, a key limitation is that IPA Installer does not sign IPA files; it only installs those already signed with a valid certificate. This distinction often leads to confusion, as users might encounter verification errors if attempting to install unsigned or revoked files. Reviews also indicate a storage space limit that can restrict larger installations. Despite these caveats, for individuals with pre-signed IPAs, it offers a convenient, computer-free method to manage apps on the go. It's particularly suited for developers or tech-savvy users familiar with iOS file handling, but less ideal for beginners unaware of signing requirements.