Spendora

The problem

Most money apps either pre-fill fake data, need a constant connection, or bury a simple question, "where did my money go?", under ads and bank-linking. People skip logging an expense the moment it gets slow or the signal drops.

What we built

A fast, calm expense tracker where every account starts empty and every change is saved on the phone first, then synced. Multiple income sources, category budgets, recurring bills, savings goals, shared group expenses and plain-language monthly insights, all behind an optional PIN or fingerprint lock.

The result

A production-grade mobile app with an offline outbox that never loses or duplicates an entry, exact-to-the-paisa money maths, and a 100-test API suite covering calculations, sync and data isolation.

Best features

• Works with no signal

  Add, edit and delete expenses anywhere. Changes save on the phone first and sync automatically when you're back online, with a slim banner that only speaks when there's something to say.

• Know your month at a glance

  The home screen answers one question: how much is left? Remaining balance, percent of income spent, today's spending, daily average and one-tap Quick add for your most frequent expenses.

• Multiple income sources

  Salary, freelance, business or bonus. Every expense can be paid from a named source, so you always see what's left per source. Recurring income comes back pre-filled each month, added only when you confirm.

• Budgets that warn you early

  Set a monthly limit per category. Bars turn amber at 80% and red when over, and alerts surface on the home screen before the month gets away.

• Shared expenses, settled fairly

  Create groups with other users or split quickly with people who aren't on the app. Equal splits are exact to the paisa, opposite debts cancel out, and repayments are never counted as income or spending.

• Savings goals and recurring bills

  Progress rings, a per-month target to hit your date, and recurring schedules for rent, internet and subscriptions that you record or skip when due.

• Insights in plain language

  Daily spending chart, this month versus last, a category breakdown, a six-month trend and highlights like "You've kept 96% of this month's income so far."

• Private by default

  Optional PIN or fingerprint lock with a lock screen that shows no money details, rate-limited sign-in and a CSV export of your data any time.

How we handled the hard parts

Offline sync that never duplicates

Every change goes into a local outbox with a phone-generated unique ID, so a retry after a dropped connection is recognised and never creates a second record. Changes the server can't accept are listed with the reason instead of vanishing.

Money maths you can trust

All totals are calculated on the server in exact decimal arithmetic, never floating point, and every division is guarded so an empty month shows zero rather than an error.

Fast search at scale

Full-history search with filters pages through results with cursor pagination and database indexes, so the thousandth result loads as quickly as the first.

Your data stays yours

Every request is filtered to the signed-in user and tested for isolation. Group members only ever see the group's own expenses, never anyone's personal finances.

Stack

Frequently asked questions

Keep exploring

• Mobile App Development : Android and iOS apps: offline-first, store-ready, one codebase.
• Custom Software Development : Internal systems, portals and tools built around your actual workflow.
• Keynou Flow case study : A real-time Kanban workspace, boards, cards, checklists, comments and live presence, built as a free-first alternative to heavyweight task tools.
• ChopLine case study : Queue & appointment management for barber shops and salons.
• Workflow automation for accounting firms : the same fixed-price, built-around-your-workflow approach for accounting firms.
• Software we build, by industry