AltServer is a free Mac utility that lets you sideload apps onto your iPhone or iPad by running a personal AltStore server directly from your desktop — no jailbreak required.
What is AltServer?
AltServer is the Mac-side companion to AltStore, a sideloading platform for iOS. It works by exploiting Apple's own developer provisioning system — your Mac signs apps with your personal Apple ID and installs them on your device, just as Xcode would for a developer. The key difference is that it wraps this process in a user-friendly menu-bar app, so you don't need to touch Xcode at all.
Once installed, AltServer sits quietly in your menu bar and talks to your iPhone over Wi-Fi or USB. Every seven days, when Apple's free developer certificates expire, AltServer automatically re-signs and refreshes your sideloaded apps so they don't go dark.
What does AltServer do best?
AltServer's strongest suit is getting Delta — the beloved Nintendo emulator — and other apps that Apple won't approve onto your device without the drama of a jailbreak. It handles certificate renewal automatically in the background, which is the single most painful part of any manual sideloading workflow.
- One-click AltStore installation: a single menu-bar action pushes AltStore onto the device; after that, most sideloading happens from the phone itself.
- Wi-Fi refresh: as long as your Mac and iPhone are on the same network, AltServer wakes and refreshes certs without you touching a cable.
- App-specific passwords: two-factor Apple IDs are supported via App-Specific Passwords, which keeps the security handshake clean.
- No jailbreak, no permanence risk: everything runs through Apple's legitimate provisioning APIs — a factory reset leaves no trace.
I've been running it for weeks and the only time I notice it is when I don't notice it — apps refresh, the badge clears, done.
Is AltServer free?
Yes — AltServer and AltStore are entirely free to download and use for personal sideloading. There is a paid AltStore PAL tier available in the EU under the Digital Markets Act, but the classic AltServer workflow on a Mac costs nothing beyond your existing Apple ID.
The one real cost is attention: you need to keep the AltServer process running on a Mac (or a PC) that shares a network with your iPhone, because without a running server the automatic refresh job can't fire. A spare Mac mini on your desk or an always-on laptop works perfectly.
Who should use AltServer?
AltServer is aimed squarely at iOS enthusiasts who want apps that Apple's review process keeps off the App Store — emulators, certain ad-blockers, experimental utilities, and apps whose developers have chosen not to pay Apple's 30 percent. If you've ever wanted to run Delta, Clip, or UTM on your iPhone without voiding your warranty, this is the route.
It is not for complete beginners. The setup involves iTunes (or the Apple Devices driver on Windows), an Apple ID login in a third-party app, and some mild networking awareness. On Mac the experience is considerably smoother than on Windows — AltServer was clearly designed with macOS in mind first.
Power users who run Homebrew, manage their own developer certificates, or have flirted with Sideloadly or AltDeploy will feel right at home.
How does AltServer compare to alternatives?
The two closest rivals are Sideloadly and Esign (on-device). Sideloadly is a capable alternative that handles more IPA edge cases and works without a constantly running background process — but its UI is rougher and it lacks AltStore's app library. Esign runs entirely on the iPhone, which sounds convenient, but it requires a paid certificate or a revocation-prone free cert that breaks constantly.
AltServer wins on polish and reliability for the mainstream sideloading use-case. If you specifically need to sideload a single IPA you found elsewhere, Sideloadly may be quicker. If you want a curated library of vetted sideloadable apps with automatic refresh, AltServer plus AltStore is the most stable stack available today.
What are the best AltServer alternatives?
Beyond Sideloadly and Esign, TrollStore deserves a mention — on supported firmware versions it installs apps permanently without the seven-day expiry, which is a significant advantage if your device qualifies. For EU users running iOS 17.4+, Apple's own third-party marketplace support is an emerging alternative, though app selection remains thin. Xcode itself can sideload any app you compile, but that's a workflow, not a product.
