Compatible Devices
Minimum Requirements
| Requirement | Minimum |
|---|---|
| Device | iPhone with A12 chip or later |
| iOS version | iOS 17.0 or later |
| Storage | 1 GB free (minimum); 10 GB+ recommended |
iPhone Compatibility
| Model | Supported | Performance |
|---|---|---|
| iPhone 16 Pro / Pro Max | ✅ | Excellent |
| iPhone 16 / Plus | ✅ | Excellent |
| iPhone 15 Pro / Pro Max | ✅ | Excellent |
| iPhone 15 / Plus | ✅ | Excellent |
| iPhone 14 Pro / Pro Max | ✅ | Excellent |
| iPhone 14 / Plus | ✅ | Excellent |
| iPhone 13 Pro / Pro Max | ✅ | Very Good |
| iPhone 13 / mini | ✅ | Very Good |
| iPhone 12 Pro / Pro Max | ✅ | Good |
| iPhone 12 / mini | ✅ | Good |
| iPhone 11 Pro / Pro Max | ✅ | Good |
| iPhone 11 | ✅ | Fair |
| iPhone XS / XR / X | ✅ | Slow |
| iPhone 8 / 8 Plus | ✅ | Slow |
| iPhone 7 or earlier | ❌ | Not supported |
Symetri is an iPhone app. It will run on iPad in compatibility mode, but the UI is designed for iPhone portrait orientation and is not optimized for iPad use.
Performance by Feature
Face Alignment
Runs every time you open a case.| Device generation | Speed |
|---|---|
| iPhone 13 and later | Near-instant (< 1 second) |
| iPhone 11–12 | 1–2 seconds |
| iPhone X–XS–XR | 2–4 seconds |
Background Removal
The most demanding operation in the app.| Device generation | Speed per image |
|---|---|
| iPhone 13 and later | 2–4 seconds |
| iPhone 11–12 | 4–8 seconds |
| iPhone X–XS–XR | 8–15 seconds |
Video Export
| Format | iPhone 14+ | iPhone 11–13 | iPhone X–XS |
|---|---|---|---|
| Feed 4:5 | 10–20 sec | 20–40 sec | 40–90 sec |
| Story 9:16 | 15–30 sec | 30–60 sec | 60–120 sec |
Optimizing Performance
Keep the device cool
Keep the device cool
iPhones throttle the processor when they overheat. Remove the case during intensive operations, avoid direct sunlight, and give the device a 5-minute break between large batch exports.
Keep battery above 20%
Keep battery above 20%
iOS activates Low Power Mode at 20%, throttling the CPU and GPU. Keep the device plugged in during batch exports.
Close background apps before large exports
Close background apps before large exports
Double-press the Home button (or swipe up and hold) and swipe away apps you don’t need. This frees RAM for image processing.
Restart weekly
Restart weekly
For devices used heavily in a clinical setting, a weekly restart clears accumulated memory and keeps the system running cleanly.
Storage Requirements
Per-Case Storage Estimates
| Case type | Photo pairs | Approx. storage |
|---|---|---|
| Single angle | 2 | 8–15 MB |
| 3-angle | 6 | 25–45 MB |
| 5-angle | 10 | 40–75 MB |
Library Size Estimates
| Cases | Mix | Approx. total |
|---|---|---|
| 50 cases | Mostly single-angle | 500 MB – 1 GB |
| 100 cases | Mixed | 2–3 GB |
| 200 cases | Mostly 3-angle | 5–8 GB |
| 500 cases | Mostly 3-angle | 12–20 GB |
Recommended iPhone Storage
| Practice volume | Recommended storage |
|---|---|
| Solo injector, < 50 cases/year | 128 GB |
| Solo injector, 50–200 cases/year | 256 GB |
| Multi-injector or high volume | 256–512 GB |
Camera Recommendations
Use the 1× Main Lens
The 1× lens produces the least distortion and is most consistent across iPhone models. It’s the default when you open the Camera app.Resolution Setting
On iPhone 14 Pro and later, you can shoot in 48MP or 12MP. Symetri processes images at 2048px for alignment — 12MP is recommended for faster imports with identical alignment quality. To set: Settings → Camera → Formats → choose High Efficiency (12MP default).Checking Available Storage
- Go to Settings → General → iPhone Storage.
- Scroll to find Symetri in the app list to see exactly how much it’s using.