# Update your iPhone's iOS

> At Nutrisense we want to make sure that you have the best inapp experience possible If youre an iPhone user please note that our app requires iOS 13 or new

Source: https://support.nutrisense.io/en_us/update-your-iphones-ios-ryRByc0klx

Last updated: 2026-01-09T15:43:51.395Z

The **Nutrisense app requires iOS 16.2** or newer, and the **Stelo app requires iOS 18.6** or newer to function properly and provide you with the optimal glucose monitoring experience. This comprehensive guide walks you through checking your current iOS version, preparing for an update, and successfully updating your iPhone to ensure full app compatibility.

##   
What You'll Learn

*   [iOS Requirements and Compatibility](#ios-requirements)
*   [Pre-Update Preparation](#pre-update-preparation)
*   [Checking Your Current iOS Version](#checking-ios-version)
*   [Wireless Update Process](#wireless-update-process)
*   [Post-Update Steps and App Installation](#post-update-steps)

##   
iOS Requirements and Compatibility

Understanding minimum system requirements ensures your device can run the Nutrisense app with full functionality.

### Minimum iOS Version Requirements

**Critical Requirements:**

*   **Nutrisense app:** iOS 16.2 or later
*   **Stelo app:** iOS 18.6 or later

##   
Pre-Update Preparation

Essential steps to protect your data and ensure a smooth update process without complications.

### Essential Backup Steps

Creating a complete backup protects your data, settings, and app information:

#### iCloud Backup (Recommended)

1.  Connect to Wi-Fi and plug into power
2.  Go to **Settings > \[Your Name\] > iCloud > iCloud Backup**
3.  Tap **Back Up Now** and wait for completion
4.  Verify backup completion with a timestamp  
      
    

### Network and Power Preparation

Ensure stable conditions for the update process:

*   **Wi-Fi connection:** Connect to reliable, unlimited Wi-Fi network
*   **Power source:** Plug into charger or ensure 50%+ battery level
*   **Time availability:** Allow 30-90 minutes for complete process
*   **Interruption prevention:** Avoid during important calls or meetings

##   
Checking Your Current iOS Version

Quick steps to identify your current iOS version and determine what updates are available.

### Finding Your iOS Version

1.  Open the **Settings** app on your iPhone
2.  Tap **General**
3.  Tap **About**
4.  Look for **Software Version** or **iOS Version**

Your version will display as something like "iOS 15.20.0"

##   
Wireless Update Process

Step-by-step guide to updating your iPhone wirelessly without needing a computer.

### Initiating the Update Process

1.  **Connect to power:** Plug your iPhone into a charger or ensure 50%+ battery
2.  **Connect to Wi-Fi:** Join a stable, unlimited Wi-Fi network
3.  **Access Settings:** Open Settings app from your home screen
4.  **Navigate to General:** Tap "General" in the settings menu
5.  **Select Software Update:** Tap "Software Update" at the top of the General menu

![iOS Settings showing Software Update option](https://nutrisense.intercom-attachments-1.com/i/o/148389302/6d702b0148e68f29d4a8350e/ios12-iphone-x-settings-general-software-update-cropped.jpg)

###   
Download and Installation Process

If an update is available, follow these steps:

1.  **Review update details:** Read the update description and size requirements
2.  **Tap "Download and Install":** Begin the download process
3.  **Enter passcode:** Provide your device passcode when prompted
4.  **Agree to terms:** Accept the software license agreement
5.  **Monitor download progress:** Watch the progress bar and estimated time remaining

###   
During Installation Process

The installation process involves several automatic steps:

1.  **Preparation phase:** iOS prepares your device for installation
2.  **Installation progress:** Progress bar shows installation status
3.  **Multiple restarts:** Device will restart several times automatically
4.  **Setup screens:** May display welcome screens for new features
5.  **Final verification:** iOS verifies successful installation

**Important:** Do not attempt to use your phone during installation. The screen may appear black or show the Apple logo - this is normal behavior.

##   
Post-Update Steps and App Installation

Final verification steps to ensure optimal Nutrisense app performance after your iOS update.

### Verifying Successful Update

Confirm your update completed successfully:

*   **Check iOS version:** Settings > General > About > Software Version
*   **Install Nutrisense app:** Download from the App Store if not already installed
*   **Test app functionality:** Open and verify the app works properly

**Success Indicators:**

*   iOS version shows 16.2 or higher for Nutrisense app
*   iOS version shows 18.6 or higher for Stelo app
*   Apps download and open without errors
*   All device functions work normally