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. Unlike App Store apps, which are tightly regulated for size, 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 most iPhone users, photos and videos represent 20–40% of total storage usage. 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,” then ensure “Optimize iPhone Storage” is selected rather than “Download and Keep Originals.”

On a 64 GB iPhone with 12 GB of photos, this alone can reclaim 8–10 GB. On larger photo libraries it can reclaim considerably more.

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 offloaded through this mechanism — you would need to delete and reinstall them through Scarlet iOS.

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 each app’s settings menu.
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 60–80% 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 each category and select Review [Category] to delete what you do not need. 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. Scarlet iOS maintains its own library of available apps, so you can always reinstall without keeping local copies. If you want to archive specific IPA versions, store them in iCloud Drive rather than local storage — they will still be accessible when needed but will not consume device storage.

For guidance on the full installation process, see our walkthrough on how to sideload apps on iOS 18 without jailbreak.

Manage Emulator ROM Libraries Efficiently

Emulators are the sideloaded app category most likely to consume enormous storage. A full library of Nintendo 64 ROMs, for example, can exceed 10 GB. There are smarter ways to manage this.

Store ROMs in iCloud Drive rather than locally. Most modern emulators (Delta, Provenance, PPSSPP) can read from iCloud Drive, so ROMs are accessible on-demand without permanently occupying device storage.
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. Many 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 specific apps Apple has determined you rarely use, and clearing Safari website data. These recommendations are worth reviewing — Apple has visibility into your usage patterns that makes these suggestions surprisingly accurate.

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 offloaded — but they can be deleted with the knowledge that Scarlet iOS makes reinstallation trivially fast. If you have emulators for five different console generations but only actively play two, delete the other three. They take seconds to reinstall when you want them.

Make Room, Get More Apps

With the steps above, most iPhone users can reclaim between 5 and 20 GB of storage depending on their usage patterns. That is room for dozens of additional sideloaded apps, emulators, and IPA files. Storage management is an ongoing practice rather than a one-time task — 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