Interfaces with personality
Sketches turn into playful layouts, motion, and sound that make utility tools feel welcoming and fun to use every day.
- Custom iconography
- Theme-able design systems
- Accessibility-first gestures
Indie App Lab · HCMC
Playful digital tools crafted by a solo maker.
OtterSpark is my indie label for experiments that make everyday workflows feel lighter. Each app is designed, built, and supported by one person obsessed with delightful details.
- Apps shipped
- 3
- Platforms supported
- iOS · Android
- Built & maintained by
- One maker
Thoughtful software, handcrafted end-to-end
I noodle on ideas, sketch interfaces, write the code, and polish every micro-interaction myself. Shipping solo means every release reflects one clear vision.
Code that respects your time
I obsess over fast launches, offline resilience, and privacy-friendly analytics so tools behave reliably on the go.
- Type-safe foundations
- Performance profiling
- Privacy-first telemetry
Community-powered roadmap
Feedback loops run directly through inbox notes and beta builds, shaping what ships next without layers of hierarchy.
- User-led experiments
- Friendly support replies
- Open build logs
Sustainable indie cadence
I iterate in focused batches, validate ideas with real users, and keep releases lean enough for one person to support long term.
Weekly changelog notes
Kitchen-table usability tests
Slow, steady updates
Live apps under the OtterSpark label
These are the tools I rely on daily and continue to iterate in public. Download them, send feedback, and help shape what ships next.
UniQR
QR all-in-one utility tool
Scan, generate, and stash QR codes in one friendly app. Quick actions, history search, and custom theming keep your codes tidy and ready.
- Smart history & tagging
- Offline-ready scanner
- Customizable layouts
Tempra
Multiple parallel productivity timer
Run concurrent focus tracks for work, study, and rest. Visual progress rings and gentle nudges help balance deep work with mindful breaks.
- Color-coded timelines
- Intentional break cycles
- Daily rhythm insights
Pawlyze AI
AI co-pilot for modern pet parents
Snap your pet to identify breeds, log wellness signals, and keep daily care todos synced—Pawlyze AI brings proactive insights into a single playful app.
- AI-powered breed scanner
- Health logs & reminders
- Care insights & todos
How each release comes together
Solo building means short feedback loops. I collect signals, design in Figma, code in TypeScript, and ship updates with plenty of play-testing.
01 · Explore
Chasing curiosities, noting friction in daily routines, and sketching rapid prototypes.
02 · Build
Designing UI kits, writing code, and dogfooding features across devices.
03 · Polish
Squashing edge cases, adding ease-of-use touches, and sharing updates with the community.
Curious about the journey?
Here are a few behind-the-scenes answers for fellow makers and supporters following along.
Who keeps OtterSpark running?
Just me! I design the interfaces, write the code, ship the releases, and answer every support email under the OtterSpark name.
How are new features prioritized?
I keep a living roadmap fueled by my own usage and community suggestions. If you have an idea, email me and it just might sneak into the next build.
Can I get involved?
Absolutely. Join beta tests, share bug reports, or spread the word—every bit of support helps this indie lab keep experimenting.
Follow the build or drop me a note
Have feedback on UniQR or Tempra—or an idea for what to craft next? I read every message and love chatting with fellow builders.