If you're still sticking with your old Nexus 7 (2013) and missing the sweet treats of newly released Android 7.0 Nougat, we have some good news for you. An AOSP based Android Nougat ROM is now available for your Nexus 7 (2013). Though we had previously reported you about this AOSP ROM, but now we have some more details regarding its stability state and installing procedure.
XDA developers named DevSwift1, zaclimon, and parrotgeek1 are the creators of this AOSP based ROM. ROM seems to be quite stable; as per the change log, audio, brightness, GPU acceleration, Bluetooth, WiFi, GPS, NFC, Location Services, video playback and sensors are working fine. The only problem is with shooting 1080p video, though, which seems to be of poor quality. And as you can see in the video - attached below the post, everything is running super-quick. Considering ROM is still in its initial stage, this is pretty impressive, though. As always the case with the custom ROMs, installing this Android Nougat ROM on your Nexus 7 (2013) will require an unlocked bootloader and custom recovery - TWRP for an example. If you're meeting these requirements, then the process of installation is fairly easy - Assuming you have some basic knowledge of flashing. It's recommended that you take a backup of your important data before installing this ROM, so in case, if anything goes wrong, you don't end up losing your important data. Follow these instructions for installation of the ROM: First, download the zip file of this ROM for your Nexus 7 (2013) from XDA forum - linked below, and transfer it to your device's internal storage. Then power off your device, and then hold the power button and volume up key at the same time for few a few seconds you see an options menu, from the options menu, scroll through the reboot into recovery option and press volume down button to enter into recovery mode. After you enter into recovery mode, choose install from SD card and scroll through the location where you previously put your ROM zip file, select it and confirm installation and wait for the installation to complete and reboot. Keep in mind, this ROM is AOSP based, meaning, it doesn't come with any Google apps preloaded; you will need to side-load Gapps package if you want to use Google apps.
As Google has now posted the source code for Android Nougat, we will see more custom ROMs coming in for devices that are left out of the official update. For a recap, Android Nougat brings many new features and functionalities such as new multi-window mode, improved Doze mode - which now works even when you're carrying your device, bundled notifications and quick reply, better RAM management, Vulkan API - on supported devices, and many more behind-the-scene optimizations to improve the user experience.