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ThreeSunnyDev

Simple apps built with clarity and purpose.

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What we do

We build apps for the small things that quietly matter — tracking where your money goes, staying consistent with your goals, and making sense of your habits over time.

Not because those things are hard to understand, but because it's easy to lose track of them when life gets busy.

From using a simple expense tracker app to understand your daily spending, to tools that help you stay consistent and build better habits, our focus is always the same:

Clarity over complexity.
Awareness over guesswork.

No accounts. No cloud. No unnecessary features.
Just simple, focused tools that help you manage your money, stay on track, and move forward with confidence.

Our approach

We design with intention: simple, private, and built to fit naturally into your day. No noise, no clutter — just thoughtful tools that help you stay grounded, make better decisions, and move forward with clarity.

  • Keep it simple

    Only what matters — nothing extra to get in your way

  • Keep it private

    No accounts, no tracking — your data stays with you

  • Fit real life

    Tools that adapt to your routine, not the other way around

  • Stay consistent

    Designed to help you keep going, even on busy days

How it works

Simple tools that help you stay consistent — not through pressure, but through clarity and small daily progress.

01

Capture

Log what matters — quickly and without friction

02

See Clearly

Turn everyday data into something easy to understand

03

Stay Aware

Keep a clear picture without constant effort

04

Move Forward

Make better decisions, one small step at a time

ExpenseKing app icon

ExpenseKing

Offline Expense Tracker for Android

Take control of your spending with a simple, powerful personal expense tracker that works completely offline. No account, no cloud, no subscriptions.

  • Works 100% offline

    No internet needed, ever. No account, no cloud, no subscriptions.

  • Multiple wallets

    Cash, bank, credit card, e-wallet — each tracking its own balance.

  • Category budgets

    Set spending limits per category and stay on top of where your money goes.

  • Insights & charts

    Visualize spending patterns, monthly trends, and averages at a glance.

Expense King app screenshot showing the Insights screen with spending charts and category breakdown
Activity Compass app icon

Activity Compass

Activity Tracker & Habit Builder for Android

Stay consistent without rigid schedules. Activity Compass adapts to your real pace, surfaces your next best task, and rewards you for showing up.

  • Smart pace tracking

    Tracks your real speed across sessions and tells you exactly when each activity is due.

  • Quick Tasks

    One tap surfaces the highest-impact, lowest-effort task — so you always know where to start.

  • Earned rest days

    Hit your targets consistently and earn guilt-free breaks without losing your momentum.

  • Session history

    Detailed logs of every session so you can see exactly how far you've come.

Activity Compass app screenshot showing session history and progress

Built for everyday life

Whether you're managing money, building habits, or working toward a goal — these tools are designed to help you stay consistent.

  • 💰

    Track your spending

    Stay aware of where your money goes — without overcomplicating it

  • 📚

    Study consistently

    Break down learning into manageable, repeatable progress

  • 💪

    Build better habits

    Stay on track with routines that actually stick

  • 🚀

    Work on side projects

    Make steady progress, even with a busy schedule

And this is just the beginning.

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What's next

More apps coming soon

We're working on new tools with the same focus: simple, private, and genuinely useful. Stay tuned.