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Userfeel: a remote usability testing tool
UK
Information Technologies
March 2017 - ongoing
Userfeel is a usability testing tool that gives you videos of real users speaking their thoughts as they use your website or app. Userfeel was designed and developed by usability researchers for usability researchers, newcomers to UX Research and anyone who wants to optimize their website or app.
SCREENS:
Services
Mobile development
iOS
Android
Technologies:
Kotlin
Swift
Java
Replay Kit
FFMPEG
Screen Capturing
Broadcasting
Encryption
Team composition:
1 iOS developer
1 Android developer
1 QA engineer
The Challenge
Uninterrupted video recording
Userfeel requires up to 30 minutes of video recording per session. A big challenge was to record a user’s screen but ignore interruptions such as incoming calls and instant chat messages that can occur during a session.
Video uploading
Userfeel video files are resource-intensive and can weigh up to 4 GB, so uploading them can take a long time. Uploads can also crash for various reasons. The challenge was to minimize upload time and make this process as smooth as possible.
Screen recording and uploading in background mode
iOS doesn’t allow for activity when an app is running in background mode. We had to find a way to bypass this system constraint and enable video capturing and uploading in both in-app and background mode.
Time constraints
As often happens, the client had a short time frame for app release. NERDZ LAB had to deliver the iOS app in one month and the Android app in just two months.
Software and hardware requirements
We had to develop native apps for both iOS and Android. Given all the differences, peculiarities, and constraints in these systems, we had to build supported and compatible software for both of them.
THE SOLUTIONS:
- Background operation. Thanks to suitable permission handling, the NERDZ LAB solution allows iOS users to record and upload a testing video even when the application isn’t active. This addressed the system constraint for background tasks.
- Robust screen recording. The NERDZ LAB development team implemented a mechanism for pausing and resuming recording when common user actions take place. This allows the app to filter out interruptions and organize the testing video accordingly.
- System backups. We built and integrated a testing recovery system that runs a sample test for a few seconds, then caches the video and restores the upload if interrupted. This ensures continuous testing process.
- File compression. We integrated the FFmpeg tool for video file compression. This made uploading smoother and faster.
- Agile project management and business analysis. NERDZ LAB collected all requirements, defined all the critical tasks, and then used agile project management techniques to deliver a market-ready solution after one iteration in less than a month for the iOS app and less than two months for the Android app.
- Customized cross-platform functionality. We implemented customized video props and the most appropriate codecs for recording, converting, and editing video depending on the user’s device.
The results
Trusted by over 200 organizations.
Trusted by worldwide companies, such as TripAdvisor, 99design, and TESCO.
Over 100,000 downloads on Google Play
More than 20,000 installs on iOS devices.
An estimated client revenue of over $6 million
TESTIMONIAL
Yannis Karampelas
Userfeel
Yannis Karampelas
Userfeel
