Troubleshooting

Performance tuning

Fluera targets 60 FPS and low-latency ink on supported hardware. Actual performance varies by device, canvas complexity, and active features.

Updated 20 April 2026

Fluera’s engine targets 60 FPS and low-latency ink on supported hardware. Actual performance varies with the device, input stack, canvas complexity, and active features.

Diagnostics

Open Settings → Advanced → Performance. You’ll see:

  • Current FPS — should hover at 60 (or 120 on ProMotion devices)
  • Stroke latency — compare the reading with the target documented for your device and input stack; there is no universal threshold
  • Memory used — absolute and as percentage of your device’s budget
  • Tile cache hit rate — should be >90 % during normal zoom/pan

If anything here is red, the likely culprits are in the list below.

Large canvases

Large canvases may require tuning. Start with these two settings:

  • Memory budget. On devices with less than 6 GB of RAM, Fluera’s default memory budget is conservative. If you have lots of RAM and want faster zoom responses, raise it in Settings → Canvas → Memory budget to Generous.
  • Level of detail. The default LOD policy simplifies strokes at very low zoom levels. If you notice jittery-looking strokes when zoomed out, switch LOD to High detail — but expect ~10 % more GPU load.

Audio-synced recording (Time Travel)

Time Travel stores audio alongside stroke timestamps. For a 60-minute lecture, that’s roughly 20 MB of audio. It’s not the audio that slows things down — it’s the index. Try:

  • Settings → Time Travel → Index granularity set to Standard rather than Fine
  • Clearing old Time Travel sessions you don’t need (they are kept locally by default; the clear-cache button removes them safely)

Apple Pencil specifically

On iPad, the default Predicted touch mode is designed to reduce perceived stroke latency. Results vary by iPad, Pencil, OS version, and canvas load. If you’ve disabled prediction (in Settings → Canvas → Stroke latency → Standard), put it back to Predicted. Prediction is an Apple Pencil API, not a guess — it uses the hardware’s own trajectory prediction.

When nothing helps

Run Settings → Advanced → Export diagnostics. You get a small JSON file with FPS samples, memory usage, and (anonymous) device information. Email it to support@fluera.dev with a short description of when things slow down.

Diagnostics help support investigate performance issues. Investigation time and outcomes vary with the issue and the available data.

Next