How to Free Up iPhone Storage for More Sideloaded Apps

Storage space is the invisible ceiling that limits how many sideloaded apps you can keep installed. Sideloaded apps can range from tiny utilities under 10 MB to emulators loaded with full ROM libraries that consume gigabytes. If you are finding that your iPhone is perpetually full, or that you have to delete one app every time you want to install another, this guide will help you reclaim significant storage space without sacrificing the content you care about.

We will cover everything from the obvious quick wins to the overlooked storage drains that accumulate silently over time, all with the goal of giving you more room for apps installed through Scarlet iOS.

Start With the Storage Audit

Before deleting anything, understand exactly where your storage is going. Navigate to Settings > General > iPhone Storage and wait for the bar chart and app list to fully load. This screen shows your storage by category at the top and by individual app below. It is one of the most useful screens on iOS for this purpose.

Pay particular attention to:

Photos & Camera: Often the single largest consumer on most iPhones
Podcasts and Music: Offline content accumulates quickly
Messages: Video attachments in iMessage threads can total multiple gigabytes
Safari: Offline reading list items and website data
Individual apps with large “Documents & Data” sections: These are often the most surprising

Enable iCloud Photos to Clear the Biggest Drain

For many iPhone users, photos and videos are the largest share of storage. iCloud Photos solves this elegantly: it keeps full-resolution originals in iCloud while storing compressed previews on your device. When you need a photo, iOS downloads the full version on demand.

To enable this: Settings > [Your Name] > iCloud > Photos > toggle on “iCloud Photos,” (called “Sync this iPhone” on newer iOS versions), then ensure “Optimize iPhone Storage” is selected rather than “Download and Keep Originals.”

With a large photo library, this alone can reclaim several gigabytes.

Offload Unused Apps (Without Deleting Data)

iOS has a built-in feature called “Offload Unused Apps” that removes the app binary while keeping its documents and data intact. This is perfect for apps you use occasionally: you can offload them to save space and restore them from the App Store in seconds when needed.

Enable automatic offloading: Settings > App Store > toggle on “Offload Unused Apps.”

Or do it manually per app: Settings > General > iPhone Storage > tap any app > “Offload App.”

Note that this works for App Store apps. Sideloaded apps cannot be restored from the App Store after offloading. Offloading still keeps their data, but you have to reinstall them through Scarlet iOS to use them again; deleting them frees more space but erases their data.

Clear App Caches and Documents Data

Many apps accumulate substantial cached data over time. Streaming apps download content you have watched and never automatically clear. Social apps cache images and videos. Games save replays and screenshots you never look at. None of this appears in the app’s visible storage until you look at “Documents & Data” in the iPhone Storage screen.

Common offenders:

Spotify / Apple Music: Downloaded playlists and podcasts. Remove individual downloads through the app’s settings.
Netflix / Disney+: Downloaded shows. Go to Downloads in each app and delete content you have finished.
Snapchat: Notorious for accumulating cache. Go to Snapchat Settings > Clear Cache.
Instagram / TikTok: Cached videos. Clear through the app’s settings where an option exists, or delete and reinstall.
Chrome / Firefox: Website data and cached pages. Clear through browser settings.

The Nuclear Option: Delete and Reinstall

For apps where clearing cache is buried or unavailable, the fastest method is to delete the app entirely and reinstall from the App Store. This wipes all cached data while preserving any data synced to iCloud or the app’s servers. A freshly installed app often takes much less storage than one that has been running for a year.

Manage Your Message Attachments

iMessage automatically keeps every photo, video, audio message, and GIF ever sent or received in your conversations. On a busy thread with video-sharing friends, this can accumulate to several gigabytes without you realising it.

To clear message attachments: Settings > General > iPhone Storage > Messages. You will see categories like Photos, Videos, GIFs, and Stickers with their sizes. Tap a category, then tap Edit to select and delete what you do not need. “Review Large Attachments”, when it appears, lists the biggest files across all chats. You can also auto-delete older messages: Settings > Messages > Keep Messages > set to “30 Days” or “1 Year.”

Store IPA Files Externally

If you download IPA files directly to your iPhone before installing them through Scarlet iOS, those files remain in your Files app after installation. A collection of IPA files can easily consume several gigabytes.

Best practice: After installing an app through Scarlet iOS, delete the original IPA from your Files app. Apps from the Scarlet iOS library can be reinstalled from there, so you do not need local copies of those. If you want to archive specific IPA versions, store them in iCloud Drive rather than local storage, and long-press a file you have opened and choose “Remove Download”: the file stays in iCloud Drive but no longer takes space on the device.

For guidance on the full installation process, see our walkthrough on how to sideload apps on iOS 26 and iOS 27 without jailbreak.

Manage Emulator ROM Libraries Efficiently

Emulators are the sideloaded app category most likely to consume enormous storage. A large ROM library, especially for disc-based systems like PS1 or PSP, can run to many gigabytes. There are smarter ways to manage this.

Store ROMs in iCloud Drive rather than locally. Many emulators can import ROMs from the Files app, including iCloud Drive, so you can keep the full collection there and import only what you are playing.
Only keep active games locally. Move completed games to iCloud and download them only when you want to revisit them.
Use compressed ROM formats where supported. Some emulators support .zip, .7z, or .chd formats that significantly reduce file sizes.
Be selective about console libraries. It is tempting to download complete ROM sets, but you will realistically play a fraction of them.

For more on emulator setup, see our guide on best emulators to install with Scarlet iOS in 2026.

Use the Recommendations Section

The iPhone Storage screen includes a Recommendations section that Apple populates with personalised storage-saving suggestions. These often include: reviewing large attachments, enabling iCloud Photos, offloading unused apps, reviewing downloaded videos and emptying Recently Deleted photos. These recommendations are worth reviewing, since they are based on how you actually use your iPhone. Skip Offload Unused Apps if you sideload, though: iOS brings offloaded apps back from the App Store, so it cannot restore a sideloaded one.

Consider Which Apps You Actually Need Installed Simultaneously

There is a practical question worth asking: do you actually need every sideloaded app installed at the same time? Unlike App Store apps, sideloaded apps cannot be restored by offloading, but they can be deleted and reinstalled through Scarlet iOS. If you have emulators for five different console generations but only actively play two, delete the other three. They are quick to reinstall when you want them, but deleting an app also deletes its data, so export save files and settings you want to keep first.

Make Room, Get More Apps

With the steps above, many iPhone users can reclaim several gigabytes of storage depending on their usage patterns. That is room for more additional sideloaded apps, emulators, and IPA files. Storage management is an ongoing practice rather than a one-time task, so schedule a monthly review to keep things tidy.

Ready to fill that reclaimed space with great apps? Visit Scarlet iOS to browse and install the best iOS apps that the App Store does not carry.

How to Free Up iPhone Storage for More Sideloaded Apps