From Flutter to Full Native: How We Optimized Performance and User Experience for’s Mobile App


You might recognize with Flutter, an open-source UI software application advancement package from Google that’s beneficial for establishing cross-platform mobile apps from a single codebase for any web internet browser. It was launched in May 2017, and we utilize it to establish a lot of the screens on our mobile app. While this service worked well at that time, today’s users anticipate more– more availability, more efficiency, more functions, more animation, and more development.

To that end, about 2 years back, we chose to invest greatly in a mobile-first technique to increase the development and adoption of our mobile app. As we began the research study and specified the issue to fix, we asked ourselves: What is the ideal innovation that will assist us attain our vision of being mobile-first while supplying a high-performance, native experience? How do we make sure the option can progress as the OS community modifications and separate our offering from other readily available items?

We Weighed the Pros and Cons …

Flutter is an exceptional innovation for constructing cost-efficient, multi-platform native options:

  • You can have a single codebase that operates on both platforms, which conserves time and resources.
  • Since it utilizes the exact same UI and organization reasoning on both platforms, it assists preserve consistency in the community.
  • Because it’s open source, it’s available to a wide variety of designers and business to continue to enhance it.

However, supporting both Flutter and native variations in our iOS and Android applications was impacting advancement, production assistance, quality, and the state of the codebase:

  • Leveraging Flutter works best when the app is constructed just on Flutter. In our case, since we needed to handle Flutter and native in the very same code base, it included extra overhead, which we explain next.
  • Testing was more difficult and lengthy due to the fact that Flutter wasn’t presented 100%; we required to evaluate both variations (Flutter and non-Flutter) with numerous gadgets, replicating much of the work.
  • Switching in between Flutter and native needed about 20% more advancement time for our engineers.
  • Since our variation of Flutter was obsoleted, debugging Flutter functions on iOS was hard. There’s a lack of IDE tooling, which permits the deep-dive debugging needed to guarantee a smooth user experience.
  • Debugging was more tough since we did not have robust tools in the IDE for real-time debugging or checking code at runtime to evaluate and repair source problems.
  • As brand-new additions to the OS were launched each year in the environment, accessing that performance or abilities was postponed due to the fact that we required to await Flutter SDK updates that allowed that performance.
  • We could not make the most of XCode 14.3 on iOS and continue to embrace future variations as they are launched. (XCode 14.3 offers ingenious abilities such as brand-new emoji, web app alerts, Voice Isolation for cellular calls, enhanced VoiceOver assistance, and more)

There were lots of benefits to changing to a complete native method:

  • Native advancement used exceptional efficiency and responsiveness due to optimization for particular OS and hardware.
  • The user experience was smooth since designers might abide by platform-specific style standards and utilize native UI components.
  • Developers had direct access to the gadget’s functions for producing feature-rich applications.
  • Native apps tend to rank greater in app shops, causing much better presence and discoverability. They can work offline or with restricted connection and rapidly embrace brand-new OS updates for a smooth user experience.
  • Native advancement gain from a robust set of advancement tools, libraries, and neighborhood assistance.

Yet, there were downsides to this technique, too:

  • Native advancement needs different codebases for various platforms, which would increase advancement time and expense.
  • There’s the capacity for variation in habits and UI with 2 code bases and various organization reasoning in location.

After weighing all the benefits and drawbacks, the group chose moving on with a complete native method was the very best method forward.

Native Approach Delivers Lightning-Fast Performance

Switching to a completely native technique was an enormous effort that took a year and a half to finish, however we can with confidence state that it was the best choice. The native method offers complete access to native abilities and the native community, allowing us to provide remarkable user experiences.

Tightening the codebase for enhanced readability and much easier upkeep. There is now less danger of regression concerns slipping into the codebase and lowered initialization overhead for faster screen shifts.

Going native minimized the app’s launch time by 40%, from 2 seconds to simply 1.2 seconds. The app package size is almost 30% smaller sized (280 MB rather of 398 MB), and the app’s memory finger print diminished about 65% (from 450 to 200 MB). Eventually, these modifications allow a remarkable user experience with our mobile app.

” The elimination of Flutter from our codebase and going from a hybrid codebase to totally native has actually led to the engineering group having the ability to with confidence construct out functions that look and feel much better,” states Tomdroid Anderson, Staff Software Engineer– Mobile.

Time Savings for Developers

Users aren’t the only ones who gain from going native. Our mobile designers take pleasure in time and expense savings and the capability to take advantage of the most recent, most updated functions and abilities of the Android and iOS platforms to improve and improve their tasks.

Jing Zhu, a Software Engineer who likewise dealt with the job, states the brand-new style is simpler to debug and conserves the group a great deal of advancement time considering that they do not require to construct Flutter structures and Flutter-related libraries. The table listed below programs the time cost savings recognized:

Before going Native After going Native Time cost savings (%)
Unit tests20 minutes, 46 seconds12 minutes, 38 seconds64%
iOS simulator develop24 minutes, 32 seconds 8 minutes, 32 seconds188%
Build release30 minutes, 41 seconds22 minutes, 29 seconds36%
Build business29 minutes, 3 seconds20 minutes, 25 seconds42%

Additionally, advancement cycles are much shorter, thanks to enhanced XCode times. The table listed below demonstrate how changing to native advancement has actually sped up advancement times:

Before going Native After going Native Time cost savings (%)
Clean Build 2 minutes, 16 seconds 1 minutes, 6 seconds106%
Rebuild29 seconds 2.5 seconds1060%
Unit test develop42 minutes 5 minutes, 6 seconds650%

” Removing Flutter from the codebase assists us concentrate on what each running system offers natively,” states Fernando Jinzenji, Senior Software Engineer– Mobile. “Our efficiency has actually increased significantly without the constraints of Flutter, and it’s much easier for our engineers to keep the codebase.”

Plus, the brand-new style is more modern-day. “We now have constant style colors throughout screens, which absolutely make our app appearance cleaner and more stylish,” includes Jing. “Since increasingly more Millennials are purchasing houses, the brand-new style might draw in more users to our mobile app.”

Building Better for Everyone’s Benefit

Converting our mobile app from Flutter to all-native was well worth the time and effort invested. Now, our designers can take advantage of Apple and Google’s newest functions and abilities to enhance the user experience. They’re likewise conserving considerable time, resources, and spending plan that can be reallocated into producing ingenious functions that thrill our Consumers and make their mobile experience with engaging, beneficial, and impactful.

” We no longer need to feel a specific level of stress and anxiety over the hybrid method possibly holding us back,” states Tomdroid. “Now we can concentrate on modernization efforts and allow our group to develop out cool brand-new functions.” ® is an open property market developed for everybody. We drive significant modification as we deal with an industry-leading platform at the leading edge of realty innovation. Learn more about our tasks and innovate with us as you take the next action in your tech profession.

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