After half a year experience with Fluttter, two internal projects and one commercial one, we'd like to share our view on what FLUTTER as a framework gives developers and businesses alike.

1. Poznan Flutter Developer Group
Property Investor app handover
Flutter Overview
1
Bartosz Kosarzycki
Rafał Ślósarz

2. Poznan Flutter Developer Group
Why Flutter - another generation of crossplatform
2
Native Flutter
React Native

3. Poznan Flutter Developer Group
Why Flutter - development cost
● fast development
○ proven with property-investor app
○ 1 month trial - the team progressed faster than pure native iOS
● runs on iOS & Android
○ one codebase to maintain
○ even with the same development speed - 2 platforms at once (potentially more)
● transparent, simple framework
○ fewer dependencies (e.g. no activity cycle)
○ runs the same on every device
● fast prototyping - important to test-drive new features & A/B testing
3

4. Poznan Flutter Developer Group
Why Flutter - crossplatform
BEST from CROSSPLATFORM, keeping most of the benefits from NATIVE development
Take what’s best from BOTH worlds
- native, typed language
- security
- 60 fps performance with fluid animations even on low-end devices
4

5. Poznan Flutter Developer Group
Why Flutter - HOT RELOAD
- speeds up development
- “like” on web / cross-platform
- enables testing designs and
animations easily
5

6. Poznan Flutter Developer Group
Why Flutter - maintenance / stability
- created and maintained by Google Inc.
- more than 200 devs are working on the project
- already enables both (iOS/Android) development with prospects for web/desktop in
the future
- fast growth
- Ideal for startups & test-driving new functionality but also good for large systems
- COMPILE time does not grow exponentially with code-base size
6

7. Poznan Flutter Developer Group
Why Flutter - expressive, fluid UI
- 60 fps animations - even on slow devices
- rich library of components/animations out-of-the-box
- expressive UI
- custom views
- ability to adjust layouts to user/customer demand
- iOS/Android designs are accomplished equally fast
- animations are pure functions which can be tested
- 3D models, 3D-animations
7

8. Poznan Flutter Developer Group
Why Flutter - expressive, fluid UI
8

9. Poznan Flutter Developer Group
Why Flutter - expressive, fluid UI
9

10. Poznan Flutter Developer Group
Why Flutter - expressive, fluid UI
10

11. Poznan Flutter Developer Group
Why Flutter - security
11
● Dart VM
○ Safer than JVM/Dalvik - Memory Dump proof
● Code obfuscation
○ The same as on native frameworks
● Safe storage
○ The same as on native frameworks

12. Poznan Flutter Developer Group
Why Flutter - tests
12
● Unit Tests
○ Easy to use and complete framework for creating Unit Tests
● Integration Tests
○ Widgets can be tested without running emulators or actual devices
○ Integration Tests checking UI elements are written directly by devs
● UI Tests
○ Reliable time measurements
● Coverage of 80-90% of all the code

13. Poznan Flutter Developer Group
Issues
13
● Limited set of libraries
● App lifecycle support
● Implementing advanced, platform-specific functionalities
○ Background tasks
○ Advanced notifications
● Dart Lang / Library limitations (e.g. model classes serialization)
● Release tasks need to be tackled separately for both platforms (app icons,
signing & certificates)