While some sites still offer Manga Rock Pro IPA files, installing them via sideloading (like AltStore or Sideloadly) is often unreliable as the app's backend is largely defunct. Using a modern aggregator or official app is generally considered "better" for security and content availability. If you'd like, I can help you: Find how to set up Paperback with specific sources. Compare subscription costs for official services. Find specific manga titles on these platforms. MANGA Plus by SHUEISHA - App Store
If you are looking for features similar to the old "Pro" IPA, such as offline reading and diverse source aggregation: manga rock pro ipa better
If you prefer a more stable and secure experience, these apps are available directly on the App Store: While some sites still offer Manga Rock Pro