Sideloading on iOS 15: Everything You Need to Know
Sideloading on iOS 15: The Complete Guide
iOS 15, released September 2021, brought Focus modes, SharePlay, Live Text, FaceTime links, and a significant redesign of notifications. For sideloaders, it maintained the same core mechanics as iOS 14 (see our complete guide to sideloading on iOS 14) while adding several privacy features worth understanding. If you are running iOS 15 and want to install apps outside the App Store, this guide covers everything from setup to troubleshooting.
What Changed for Sideloading in iOS 15?
App Privacy Report
iOS 15.2 introduced the App Privacy Report, found under Settings > Privacy (renamed Privacy & Security in iOS 16). This feature logs every domain each app contacts, along with timestamps of sensor access (camera, microphone, location). Crucially, this monitoring applies to sideloaded apps just as it does to App Store apps. If a sideloaded app is phoning home to unexpected servers, the App Privacy Report will surface it.
Safari 15 UI Redesign
Apple moved Safari’s address bar to the bottom of the screen by default in iOS 15 (users could switch it back). Some sideloading tutorials that referenced the URL bar at the top became temporarily confusing. The install process remains identical: only the bar’s position was different.
Intelligent Tracking Prevention Updates
Safari’s ITP received further improvements in iOS 15, blocking additional third-party tracking vectors. For sideloaded apps using web views, this meant more aggressive cookie isolation, relevant if the sideloaded app included a built-in browser component.
How to Sideload Apps on iOS 15 Using Scarlet iOS
The process is the same across all iOS versions. Scarlet iOS handles everything on-device:
- Open Safari and navigate to scarletios.com.
- Tap the install button and confirm the install prompt.
- Go to Settings > General > VPN & Device Management and trust the Scarlet iOS certificate.
- Open the Scarlet iOS app, browse the library, and tap any title to install.
- For each new sideloaded app, return to Device Management and trust its certificate if prompted.
Full iOS 15 Version Compatibility
Scarlet iOS sideloading works across all iOS 15 minor versions:
- iOS 15.0, 15.0.1, 15.0.2
- iOS 15.1, 15.1.1
- iOS 15.2, 15.2.1
- iOS 15.3, 15.3.1
- iOS 15.4, 15.4.1
- iOS 15.5
- iOS 15.6, 15.6.1
- iOS 15.7 through 15.7.9
- iOS 15.8 through 15.8.8 (updates for older devices that cannot run iOS 16)
iOS 15 Jailbreak Landscape
iOS 15 had partial jailbreak coverage. Palera1n supported iOS 15 on A9–A11 devices via the checkm8 hardware exploit. On A12 and newer devices, the Dopamine jailbreak (a fork of Fugu15) arrived later, first for iOS 15.0 to 15.4.1. Coverage was inconsistent, and stability varied significantly by device model and iOS minor version.
For most iOS 15 users, a sideloading installer such as Scarlet iOS (or TrollStore, which supports iOS 14.0 beta 2 to 16.6.1, 16.7 RC and 17.0) was the practical way to run apps from outside the App Store. For a full comparison of sideloading versus jailbreaking approaches, see Is Jailbreaking Worth It in 2026.
Popular Use Cases on iOS 15
Game Emulators
Before Apple allowed emulators in the App Store in April 2024, iOS 15 users relied on sideloaded builds of Delta, PPSSPP, and RetroArch.
Tweaked Social Media Apps
Modified versions of Instagram, TikTok, YouTube, and Twitter with features like ad removal, download buttons, and background audio were widely popular on iOS 15. These remained accessible through sideloading.
Region-Locked Content
Apps unavailable in specific App Store regional catalogs could be obtained as IPA files and sideloaded. This was particularly relevant for gaming apps exclusive to certain markets, streaming services not yet available in all countries, and utility apps blocked in specific regions.
Device Compatibility Notes for iOS 15
iOS 15 kept support for every iPhone that ran iOS 14, from iPhone 6s and iPhone SE (1st generation) onward. This made iOS 15 the last version to support the A9-chip iPhone 6s family, and sideloading via Scarlet iOS gave those devices a significant extension of useful functionality.
Troubleshooting iOS 15 Sideloading Issues
- “Untrusted Enterprise Developer” on launch: Go to Settings > General > VPN & Device Management and trust the certificate. This step is required the first time each certificate is used.
- App crashes at startup: The IPA may not be optimized for your specific iOS 15 version. Check Scarlet iOS for an updated build.
- Certificate suddenly revoked: Reinstall Scarlet iOS from the official site to get a currently valid certificate. Read our guide on how Apple detects sideloaded apps for the technical background.
- Safari blocking the download: Install links work most reliably in Safari. If Chrome, Firefox, or another browser fails, use Safari and retry.
- Settings showing “Device Management” but no trust option: Fully close and reopen Settings, then navigate back to VPN & Device Management.
Closing Thoughts on iOS 15
iOS 15 now only gets occasional updates for older devices that cannot run iOS 16 (the latest is iOS 15.8.8, May 11, 2026, according to Apple’s security updates list). Devices that can run iOS 16 or higher should consider upgrading for continued security patches. For users on iOS 15-only hardware, Scarlet iOS continues to provide sideloading support, and for everyone else, the experience only gets better on newer versions.
Download Scarlet iOS now and start sideloading on iOS 15, or any supported iOS version, in minutes.