OldOS
OldOS is a unique app that brings the classic iOS 4 interface back to life on modern iPhones and iPads. Originally built with SwiftUI, OldOS recreates the look and feel of iOS from over a decade ago, offering users a nostalgic and fully interactive experience, without needing a jailbreak.
This app isn’t just a visual replica—it’s a fully functional retro-style system. You can play music in the iPod app, get directions in Maps, browse the internet with Safari, check the Weather, and more. It works with your current iOS data to deliver a smooth, emulator-like experience that blends the past and present.
Why Try OldOS?
- 🕹 Pixel-perfect design inspired by iOS 4
- 🎵 Functional apps: iPod, Safari, Weather, Maps, and more
- ⚙ Change wallpaper, adjust settings, and search apps like the old days
- 🔉 Classic sound effects and retro animations
- 📱 Supports modern devices running iOS 14 to iOS 18+ and the latest iOS 26 beta.
- 🧊 Works with TrollStore, AltStore, Sideloadly, and other sideloading tools
OldOS is more than just an app—it’s a digital time machine for Apple fans. Whether you’re reliving memories or exploring what iOS used to be, OldOS offers a beautiful blend of nostalgia and functionality.
Experience iOS 4 on Your Modern Device – Download OldOS IPA Today!
Easily install OldOS IPA using popular tools like AltStore, SideStore, Sideloadly, TrollStore, and more—no full jailbreak needed!
Top OldOS Alternatives for Without Jailbreak (iPhone & iPad).
NewOS 11 – Enjoy the classic iOS 11 look and feel on your iPhone or iPad with the New OS IPA, no jailbreak needed!
How To Install OldOS IPA with AltStore
Step 01. Install AltStore on your iOS device.
Step 02. Download the OldOS IPA file.
Open the AltStore app on your device and go to the “My Apps” tab.
Step 03. Tap on the plus “+” icon at the top, then browse and select the OldOS IPA file that you downloaded.
Step 04. If it’s your first time using AltStore, you will be asked to enter your Apple ID and password. AltStore requires it to sign the app so it can be installed. We recommend you use a burner account.
Step 05. The app will begin to install and once completed, you can open it from your Home screen.
How to Install OldOS IPA with Sideloadly
Step 01. Download the latest version of Sideloadly for Windows or macOS and install it on your PC.
Step 02. Download the OldOS IPA file from this page and save it to your computer.
Step 03. Connect your iOS device to your computer using a USB cable.
Step 04. Open the Sideloadly app on your PC.
You may be prompted to install the Mail Plug-in. Click the “Yes” button to continue.
Enter your Apple ID email under the “Apple account” field.
Step 05. Drag and drop the OldOS IPA file into the IPA field shown on the left side of the interface. The field is represented by an IPA image.
Step 06. Click the “Start” button to begin the sideloading and installing the IPA.
When prompted, enter your Apple ID password. The tool uses your Apple ID to sideload the app. We recommend you use a burner account.
Step 07. Sideloadly will begin installing OldOS IPA on your iOS device.
Step 08. Once the app is installed, don’t open it yet. You first need to verify your Apple ID profile if it’s your first time using Sideloadly. To do it, go to Settings > General > Device Management. Tap on your Apple ID and press the Trust button. Tap on Trust again from the pop-up alert.
Step 09. Now go to the Home screen to open the installed app.
Other methods to install OldOS IPA.
TrollStore
TrollStore is a permasigned jailed app that can permanently install any IPA installer, supporting iOS 14.0, iOS 15, iOS 16, and iOS 17.0. It works by using AMFI/CoreTrust to verify that the root certificate is used to sign the app and not revoke it.
e-Sign
e-Sign is a free mobile IPA signature tool for iOS, allowing you to sign apps with your certificates and install them on your iPhone or iPad. It serves as a sideloading alternative with support for iOS 11 up to iOS 17. x, enabling the installation of IPA files without a computer.
MapleSign
Discover the most affordable signing service for your iOS devices. Elevate your experience with our ultimate free enterprise certificates IPA sideload signing service, compatible with iPhone, iPad, Apple TVOS, and visionOS.
3uTools
Using the 3uTools IPA Signature is widely regarded as the best method for installing IPA files. Whether you’re on a Mac or Windows, installing IPAs on your iPhone or iPad is straightforward.
Scarlet
Scarlet is installed with this tool, which allows you to add jailbroken repos and install IPA, all without a jailbreak, with support for iOS 11 up to iOS 17 and higher.
Compatibility iOS & iPadOS
- iOS 26 beta
- iOS 18.0, iOS 18.0.1, iOS 18.1, iOS 18.2, iOS 18.2.1, iOS 18.3, iOS 18.31, iOS 18.4, iOS 18.4.1, iOS 18.5
- iOS 17.7, iOS 17.6.1, iOS 17.6, iOS 17.5.1, iOS 17.5, iOS 17.4.1, iOS 17.4, iOS 17.3.1, iOS 17.3, iOS 17.2.1, iOS 17.2, iOS 17.1.1, iOS 17.1, iOS 17.0.2, iOS 17.0.1, iOS 17
- iOS 16.6, iOS 16.5.1, iOS 16.5, iOS 16.4.1, iOS 16.4, iOS 16.3.1, iOS 16.3, iOS 16.1, iOS 16.0.3, iOS 16.0.2, iOS 16.0
- iOS 15.6.1, iOS 15.6, iOS 15.5, iOS 15.4.1, iOS 15.4 , iOS 15.3.1, iOS 15.3, iOS 15.2.1. iOS 15.2, iOS 15.1.1, iOS 15.1
- iOS 15.0.2 , iOS 15.0.1, iOS 15.0
- iOS 14.8 , iOS 14.7.1, iOS 14.7, iOS 14.6, iOS 14.5.1, iOS 14.5, iOS 14.4.2, iOS 14.4.1, iOS 14.4, iOS 14.3, iOS 14.2.1
- iOS 14.2, iOS 14.2, iOS 14.1, iOS 14.0
Compatibility Devices
iPhone 16e, iPhone 16, iPhone 16 Plus, iPhone 16 Pro, iPhone 16 Pro Max, iPhone 15, iPhone 15 Plus, iPhone 15 Pro, iPhone 15 Pro Max, iPhone 14, iPhone 14 Plus, iPhone 14 Pro, iPhone 14 Pro Max, iPhone 13, iPhone 13 Mini, iPhone 13 Pro, iPhone 13 Pro Max, iPhone 12, iPhone 12 Mini, iPhone 12 Pro, and iPhone 12 Pro Max, iPhone 11 Pro Max, iPhone 11 Pro, iPhone 11, iPhone Xs, iPhone Xs Max, iPhone XR, iPhone X, iPhone 8, iPhone 8 Plus, Phone 7 & 7 Plus, iPhone 6S & 6S Plus, iPhone 6 & 6 Plus, iPhone SE.iPhone 11 Pro, iPhone 11, iPhone Xs, iPhone Xs Max, iPhone XR, iPhone X, iPhone 8, iPhone 8 Plus, Phone 7 & 7 Plus, iPhone 6S & 6S PlS & 6S Plus, iPhone 6 & 6 Plus, iPhone SE