DB Labs
IoT Storage Reality
Smart home devices impact iPhone storage in three ways: HomeKit Secure Video clips (temporary local cache, usually small), security camera app caches (Ring, Arlo, Eufy can grow to several gigabytes), and device control apps with thumbnail caches (smart lights, vacuums, thermostats). The biggest offender is usually a single security camera app that caches a month of motion clips. Most IoT storage impact is manageable with app cache clearing and Offload Unused Apps. Free photo library space with Swype Photo Cleaner and IoT caches become a non-issue.
HomeKit Secure Video
HomeKit Secure Video uploads clips to iCloud for analysis and storage. On iPhone, only recent thumbnails and a small cache are stored locally. Impact is usually under 500 MB. The bigger concern is your iCloud storage if you have many cameras; each camera counts toward iCloud limits based on your HomeKit plan.
Third-Party Camera Apps
Ring, Arlo, Eufy, Nest, and Wyze apps often cache weeks of motion clips locally for faster playback. This is where IoT storage bloat really happens. A Ring app can grow to 3 to 5 GB in a month. Check Settings, General, iPhone Storage, find the camera app, and tap Delete App to clear and reinstall, or look for a Clear Cache option in the app's own settings.
Matter and Thread Devices
Matter and Thread smart home devices (lights, plugs, sensors, locks) have negligible iPhone storage impact. Their control apps typically use under 100 MB combined, most of which is the app binary itself. Do not worry about these.
Smart Appliance Apps
Samsung SmartThings, LG ThinQ, and GE Profile apps cache firmware update files for connected appliances. These can occasionally spike to several hundred megabytes during an update cycle. After the update installs, the cache usually clears automatically. Manual clearing is rarely needed.
Voice Assistant Integration
Alexa and Google Assistant apps store voice history and routine configurations locally. Impact is usually 100 to 300 MB. If you want to reduce, clear voice history in the app settings and turn off always-on microphone listening if you have it enabled.
Managing IoT Storage
A quarterly IoT storage check works well:
- Settings, General, iPhone Storage. Scroll to your IoT apps.
- Tap any app over 1 GB and check what is inside.
- Use Offload App for apps you rarely open (control by voice instead).
- Clear in-app caches for camera apps.
- Verify no single IoT app dominates your storage picture.
The Bigger Picture
For most people, IoT devices add under 2 GB of iPhone storage usage combined. That is small compared to the 40 to 70 percent that photos typically take. Focus your cleanup energy where the impact is biggest. IoT is worth checking but almost never the main problem.