Product tour · Epsilon Delta Orion · Mobile app monitoring

Jank and frozen frame monitoring for Android, iOS and Flutter

Frames shows which screens drop or freeze frames, and splits frame time into layout, data and animation work, so you know what to fix first.

Frames jank, frozen frames and where frame time goes

“Which screen janks, and is it layout, data or animation?”

  • Sample data
  • Ending 24 hrs
  • Metric: Median
  • All platforms
  • All versions
Jank %
54.7 %
Avg frame duration
36 ms
Worst frame
345 ms
Frozen frames
0.11 %
  • Frozen frames at 0.11%, above the 0.1% target
  • 12% of jank bursts are Critical (>700 ms hangs)

Frames composition

781M frames analysed · Good / Jank / Frozen
Good 45.2%Jank 54.7%
  • Good 45.2%
  • Jank 54.7%
  • Frozen

Top 5 jankiest views / screens

% jank frames
  • QueueActivity99.3%
  • SearchActivity86.3%
  • productListPage42.7%
  • searchPage28.5%
  • checkoutPage19.7%

Jank & frozen trend

thresholds: 5% · 0.1%
  • Jank %
  • Frozen %
00:0004:0008:0012:0016:0020:00

Jank severity

by cluster severity
12%critical
  • Mild32.1%
  • Moderate40.5%
  • Severe15.5%
  • Critical11.9%

Jank phase

where in frame time is lost
45%data
  • Layout inflation33.1%
  • Data loading44.7%
  • Animations22.2%

Sample data on example domains (shop.example.com). Your dashboard shows your own sites and apps.

What you can see on Frames

  • Good, janky and frozen frames per screen
  • Where frame time goes
  • Breakdown by device and OS
  • Flutter and native screens

Questions about Frames

What is a frozen frame?

A frame that takes more than 700 ms to render.

What is jank?

Visible stutter when frames take longer than the display allows, about 16 ms at 60 Hz.

Last updated 6 Nov 2026 · Reviewed by [Name], [Role]