Kelvin's app development philosophy centers on prioritizing user experience at every turn. With extensive involvement in numerous end-to-end journey discussions, he's adept at tackling complex issues and crafting solutions that not only address user feedback but also maintain an unwavering commitment to code quality. A staunch advocate for maintainability, scalability, testability, and code readability, Kelvin has dedicated substantial time to researching and experimenting with various best practices and architecture patterns. Beyond technical prowess, Kelvin places a strong emphasis on honing his soft skills, demonstrating a relentless pursuit of personal growth and responsibility. His dedication to the products he builds is unwavering, regardless of whether it's explicitly required. With over 5 years of mobile development experience under his belt, Kelvin aspires to elevate his creations to world-class status by incorporating industry-leading techniques and best practices.
| App | Category | App Store |
|---|---|---|
| Beam: Learn Thai & Speak It | Education | Open |
| Bondify: The Couples Edition | Entertainment | Open |
| Whirl: Decision Roulette | Entertainment | Open |
| Odin Finance: Loans & Budget | Finance | Open |
| InstantMessage: No-Save Chat | Utilities | Open |
| Malaysia Pocket | Productivity | Open |
| LDS Quotes: Daily Inspiration | Reference | Open |
| LDS Priesthood: Ordinances | Reference | Open |
| LDS Conferences | Reference | Open |
Inspired by my marriage to a Thai woman and my desire to deeply understand Thai culture, Beam takes you from your first สวัสดี to holding real conversations. It teaches the thing most language apps skip — the five tones — with visual pitch guides, minimal-pair drills, and ear training. Speak a phrase out loud and Beam scores your pronunciation with on-device speech recognition, then puts it to work in role-played scenarios: ordering food, taking a taxi, bargaining, checking into a hotel.
Previously released as Bo - Learn Thai.

Bondify is a couples toolkit built around one idea: the right question beats small talk. Eight curated card decks — from Lovers and Deep Talk to lighter, playful sets — give you prompts for a first date, an anniversary, or an ordinary evening that deserves better than scrolling. Play together on one device or over SharePlay, and save the reflections worth keeping.
Stop overthinking, start spinning. Whirl is a decision wheel and random picker that settles “what do you want to eat?” in one tap. Beyond custom wheels, it doubles as a restaurant picker: spin through top-rated places near you and see ratings, photos, and the details that actually decide it.
Odin turns money decisions into clear visuals. Home, car, personal, and refinance loan tools sit alongside compound interest, savings goals, ROI, budgeting, debt-to-income, emergency fund, and retirement calculators — each with a breakdown and a chart, so you can see what a decision actually costs before you make it.
Previously released as Odin - Financial Assistant.

Message any phone number without saving it to your contacts first. Type the number, write the message, and send it through WhatsApp, Telegram, Viber, Line, WeChat, or SMS. Smart clipboard detection, quick-reply templates, and personalised QR codes make it effortless for others to reach you too.
Previously released as QuikApp.

Your daily companion for navigating life in Malaysia — instant access to emergency services, plain-language explanations of your rights, practical guides for everyday problems, and a simple way to report incidents. Built to take you from “this just happened to me” to knowing exactly what to do next.

A personal treasury of carefully verified quotes from prophets, apostles, and trusted Latter-day Saint voices. Tell the app how your heart feels and For You gathers a collection matched to your mood — comfort on heavy days, courage when you need strength. Make every quote your own with themes, fonts, colours, and backgrounds, then save or share it.

The wording of every priesthood ordinance and blessing, ready the moment you are asked to serve — sacrament prayers word for word, step-by-step guidance for baptism and confirmation, administering to the sick, and more, in multiple languages. Every ordinance follows the General Handbook: nothing added, nothing left out.

General Conference on the go — session summaries, newly announced temples, conference music, world reports, and live broadcasts. Challenge yourself with conference talks, explore an archive of addresses reaching back to the 19th century, and watch the countdown to the next conference.

These documents apply to every app published by Zhi Yao Tan (DaddyCoding), current and future: