iOS 27 Sideloading: What to Expect in 2026 and Beyond

ByScarlet iOS Team Updated on

iOS 27 Is Here: What Sideloaders Need to Know

iOS 27 has been publicly available since September 14, 2026, with iOS 27.2, released October 26, 2026, as the current release (per Apple’s security releases page). If you have been wondering what happened to iOS 19 through iOS 25, the short answer is that those versions never existed. Apple skipped straight from iOS 18 to a new numbering system, and iOS 27 is the second release under it.

This guide covers what is actually confirmed about sideloading on iOS 27 today, what to expect after future updates, and where things still stand for Scarlet iOS. For step by step installation instructions, our guide on how to sideload apps on iOS 26 and iOS 27 without jailbreak covers the current process in full.

Why Apple Jumped From iOS 18 to iOS 26

After iOS 18 in 2024, Apple switched its iOS version numbers to match the year ahead rather than counting up one at a time. The first release under the new system was iOS 26 in September 2025. Apple did not slow down, merge releases, or skip a year of development, it only changed how the versions are labeled. iOS 19, iOS 20, iOS 21, iOS 22, iOS 23, iOS 24, and iOS 25 were never released and do not exist. iOS 27 followed a year later, in September 2026, on the same annual schedule Apple has used for years. For a timeline of sideloading changes since then, see sideloading from iOS 18 to iOS 27.

For sideloaders, the renaming itself changes nothing about how sideloading works. What matters is which exact iOS version your device is running and whether your sideloading method of choice has confirmed support for it.

What Is Actually Confirmed for iOS 27 Sideloading

Scarlet iOS on iOS 27

Scarlet iOS works on iOS 14 through iOS 26. Third-party reports say it also runs on iOS 27, but this has not been officially confirmed as of October 2026. If your device is already on iOS 27, treat that support as unconfirmed. Scarlet iOS still needs no computer and no jailbreak; it installs directly from Safari and signs with a shared certificate instead of your Apple ID.

AltStore and Sideloadly

Both AltStore and Sideloadly are confirmed to work through iOS 26. Neither has confirmed support for iOS 27 yet. Both also still require a computer running AltServer or the Sideloadly desktop app to install and refresh apps, which keeps them less convenient than Scarlet iOS for most people.

TrollStore Is Not an Option on iOS 27

TrollStore only ever supported iOS 14.0 through 16.6.1 and iOS 17.0. It has never worked on iOS 17.1 or any version after it, which rules it out on iOS 18, iOS 26, and iOS 27 alike. If you are running iOS 27, TrollStore is simply not part of the picture, regardless of what a workaround online might claim.

The EU Marketplace Rules Have Not Changed

Since iOS 17.4, the EU’s Digital Markets Act has let users in the European Union install alternative app marketplaces and apps distributed directly from the web. That framework has carried through iOS 18, iOS 26, and now iOS 27 without being removed. Japan (since iOS 26.2) and Brazil now allow alternative marketplaces too, under their own rules. Elsewhere, this option still does not exist on any iOS version, and sideloading through a tool like Scarlet iOS remains the practical alternative.

Developer Mode and Certificates Still Work the Same Way

Whatever iOS version you are on, sideloaded apps installed through Scarlet iOS rely on the same two steps they always have.

  • Scarlet itself is enterprise-signed and does not need Developer Mode. Developer Mode, introduced in iOS 16, is needed for apps signed with your own Apple ID (SideStore, AltStore, Sideloadly) before they will open. Go to Settings > Privacy & Security > Developer Mode, enable it, and restart your device when prompted.
  • After installing, trust the app’s certificate under Settings > General > VPN & Device Management.

Signing limits have not changed either. A free Apple ID signs apps that expire after 7 days, with at most 3 sideloaded apps active at once. A paid Apple Developer account, at 99 USD per year, extends that to up to a year per app. Apple can revoke enterprise and distribution certificates at any time, and a revoked app will simply stop opening until it is reinstalled or re-signed.

What to Do After Each iOS Update

Any iOS update, including a point release inside iOS 27, carries some chance of temporarily breaking a sideloaded app. When that happens:

  • Check Scarlet iOS for an updated version before trying anything else, the team typically ships compatibility updates close to major iOS releases.
  • If an app stops opening, reinstall or re-sign it through Scarlet iOS. This resolves the large majority of post-update problems.
  • Re-trust the certificate under Settings > General > VPN & Device Management if your device prompts you to.
  • If you are unsure about updating right away, wait a few days after a new release and check for community reports before installing it on a device you rely on daily.

What This Means for Scarlet iOS

Scarlet iOS’s purpose has not changed with the move to iOS 27: installing IPA files that never reach the App Store, without a computer or a jailbreak, signed with a shared certificate instead of your Apple ID. The EU’s alternative marketplaces still require notarization, and web distribution still carries its own qualification requirements, so there remains a large gap between what official channels allow and what IPA files actually exist. Scarlet iOS fills that gap on iOS 27 the same way it did on iOS 18 and iOS 26.

Check our Scarlet iOS download guide for the version confirmed to work on your current iOS release.

What We Still Don’t Know

Apple has not published a complete account of every change in iOS 27 relevant to sideloading, and we are not going to guess at details we cannot verify. For what is actually confirmed about Scarlet itself, see Scarlet iOS in 2026: what is confirmed and what is not.

Conclusion

iOS 27 is the current version of iOS, the iOS 19 through iOS 25 numbers were never used, and the facts for sideloaders are straightforward: Scarlet iOS is officially confirmed through iOS 26, with unconfirmed third-party reports of iOS 27 support, AltStore and Sideloadly are confirmed through iOS 26 only, TrollStore stopped working after iOS 17.0, and the EU’s DMA rules remain limited to the EU. Download Scarlet iOS today and check the current compatibility status before you install.

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