WLLT
A secure, user-friendly ETH wallet and payment app for iOS and Android. Smartym Pro designed and built both native apps, letting users manage ETH and ERC-20 tokens and send funds in a few taps.
Project Challenge
The apps had to provide a secure environment for managing crypto-assets on the device. The main technical challenge was to make ETH and ERC-20 transactions execute as fast as possible, while letting users create new wallets or import existing ones and protecting them with advanced security settings.
Design Challenge
The design had to use blue and white as the predominant colours, feel calm and approachable, and avoid overloading the screens with crypto jargon: the app was built for everyday users, not crypto experts.
Team & Technology
From 2017 to 2019 a dedicated team of two iOS and two Android engineers, a UI/UX designer, a project manager and a QA engineer built the product, then continued with support. Both apps are native: Swift and UIKit with web3swift on iOS, Kotlin and Java with web3j on Android. Keys are stored in the iOS Keychain and Android Keystore and unlocked with biometrics; QR scanning, push notifications via APNs and Firebase Cloud Messaging, and REST integration with the client's backend complete the stack.
Colors
- Blue (Usage: Main color)
- Green (Usage: Success)
- Red (Usage: Errors)
- Dark (Usage: Main Headings, Body Text, Icons)
- Medium (Usage: Body Text, Description Text)
Design FAQ
What, Why and How do we do?
Discovery & Strategy
- Acceleration & Collaboration Workshops
- Personas
- Interview
- Competitor Analysis
- Journey Mapping
- Web-analytics Analysis
How does it work?
Solution Wireframing & Visual Exploration
- Information Architecture
- Proof of Concept
- Stylistic Solution
How does it look?
UI Design
- UI & Visual Design
- Visual Prototype
Does it really work?
User Validation
- User Testing
- UI & Visual Design Update
Make sure it scales
Guides & Measurement Plan
- UI Kit
- Digital Styleguide
- Marketing Materials Guide
- Web-Analytics Measurement Plan
Make sure it works
Design Review
- Development Support
- Design Review
- Perfomance Validation
ETH Wallet
We built scalable native apps for iOS and Android with support for ETH and ERC-20 tokens and advanced security settings. Users execute fast crypto-transactions and get a push notification every time they receive assets. A distinctive feature is watch-only wallets: import any wallet by its public key and follow its transaction history without exposing a private key.
Send & Receive ETH
Easy and fast transactions between any existing ETH wallets. Quick transaction info filling via QR-code scanning - no need to enter the wallet address manually, just use the scanner, or show your QR code to the addresser to receive the funds sooner. The same applies to ERC-20 tokens: the application has its own database of tokens, but you can add others to the list via its contract’s address.
Transaction History
The application gives you full transparent view on your transactions and the “watch-only” wallets transactions with maximum information presented in a perceivable way. Moreover, user can add their custom notes to any transaction to make them more distinguishable.
Result
WLLT's MVP was released on Google Play with all the features described above, and the native iOS and Android apps kept evolving under Smartym Pro support after 2019. The product roadmap included:
- BTC support in app
- The ability to buy crypto-assets via credit and debit cards
- Translating the application to more languages
- Cryptocurrency exchange functionality
Want to know more?
If you'd like more details on this project or a reference from the client, let us know.