Is It Snappy?

Is It Snappy?

by Chad Austin

28 ratings
23 reviews
Free

Details

  • Released
  • Updated
  • March 28, 2017
  • January 7, 2025

Features

Is It Snappy? screenshot #1 for iPhone
Is It Snappy? screenshot #2 for iPhone
Is It Snappy? screenshot #3 for iPhone
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About

Measure the input-to-output latency of your devices, text editors, game consoles, or televisions. Record a video of a button press and its on-screen effect, then use the frame-accurate scrubbing tool to mark precise input and output times. The app calculates the difference in milliseconds, providing objective responsiveness data.

Measure input-to-output latency
High-frame-rate camera recording
Frame-accurate scrubbing UI
Precise input and output time marking
Objective responsiveness quantification
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What's New in Is It Snappy?

1.0.6

January 7, 2025

- Fixed crash on iOS 18 - Increased minimum iOS version to 15 - Updated website links - Updated copyright

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User reviews

iOS 18 crash resolved, back to being a great tool

A simple and amazing tool to learn about displays and software settings affecting latency.

15 Pro compatibility?

it stops immediately after the shot. is this only for me?

No longer works with iOS 18

On updating to iOS 18, the app now crashes when trying to load a clip. A huge shame, this was a tool I was obsessively using to massively speed up my gaming latency tinkering.

Simple and genius

I love this! Was easily able to measure the input lag of my TV by having it mirror my laptop and switching from one browser tab to another.

The first time I ran it, it asked for photo access, which was weird. I allowed access to 0 “selected photos”, and it worked fine. (Actually it crashed the first time I clicked the camera icon, but after restarting it, it worked fine)
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Love the idea but literally won’t start

Excited to try this out but the app won’t even start. It crashes immediately. I selected to grant access only to a select few photos, instead of all—maybe that’s the problem? Pretty fundamental issue, if so.

Hope to be able to try this soon and wish the author good luck with this vague bug report

Developer apps

FAQ

What does Is It Snappy? do?

Is It Snappy? allows you to measure the input-to-output latency of various devices like text editors, game consoles, and televisions. It uses your iPhone's high-frame-rate camera to record a button press and its resulting on-screen effect.

How does Is It Snappy? measure latency?

The app provides a frame-accurate scrubbing interface. You can precisely mark the exact moment of the button press (input) and the moment the effect appears on screen (output) in the recorded video. The difference between these two points is then calculated in milliseconds.

Is Is It Snappy? free to use?

Yes, Is It Snappy? is a free application. It does not have any in-app purchases or advertisements, making it completely free to download and use for all its features.

What devices can I test with Is It Snappy?

You can use Is It Snappy? to test the responsiveness of a wide range of devices, including text editors, game consoles, televisions, and any other display or input system where you want to quantify lag.

What are the benefits of using Is It Snappy?

This app allows for objective quantification of responsiveness. Instead of relying on subjective feelings, you can get precise millisecond measurements of how quickly your devices react to input, which is useful for gamers, content creators, or anyone concerned with performance.