Mobilions built Spendulge, a Finance app for iOS and Android that tracks group expenses and splits shared costs for trips, roommates, and group dinners. Users log expenses, split evenly or manually, and settle up through peer-to-peer payment apps — one tap launches the chosen app with the amount and recipient pre-filled.
What Mobilions built and why it matters.
Spendulge is an all-in-one group expense tracker and bill-splitting app for shared costs — trips, roommates sharing bills, group dinners, and splitting rent and utilities. It lets users log group expenses, split bills instantly, and settle up using peer-to-peer payment platforms.
The settlement flow is the heart of the product. Users save their payment usernames once, and friends can then send or request money without re-asking. A single tap launches the selected payment app — PayPal, Venmo, Cash App, or Apple Pay — with the amount and recipient pre-filled. The app tracks every expense and what each person owes, records who paid, splits costs evenly or manually, and shows detailed logs of all group transactions.
Mobilions delivered Spendulge for both iOS and Android.
Key facts about the product and its audience.
Finance / Fintech
iOS and Android
Released 2025.
United States.
The engineering and product work behind the app.
The technologies used to build and ship the app.
The product and engineering problems the app set out to solve.
Splitting costs among a group and then actually collecting the money is friction-heavy: people forget who paid, re-ask for payment handles, and switch between apps to settle. Spendulge needed to make logging shared expenses and getting paid back as close to one tap as possible, using the payment apps people already have.
The app does not process payments itself — it hands off to external P2P apps. The core technical work is modeling group expenses and per-person balances accurately, storing payment usernames once, and reliably launching the right external app with the amount and recipient pre-filled across both iOS and Android.
How an app of this type is structured and built.
Information not available in source documents.
An expense-splitting app like this is built around groups, members, and expenses, with a settlement layer that computes who owes whom. Rather than holding funds, it stores each member's saved payment usernames and uses deep links to launch external payment apps with the transaction details pre-filled.
Mobilions delivered Spendulge on both iOS and Android from a shared Flutter codebase, covering group creation, expense logging, even and manual splits, saved payment profiles, the one-tap settlement handoff, and detailed transaction logs.
The notable choices made while building the app.
Spendulge launches PayPal, Venmo, Cash App, or Apple Pay with the amount and recipient pre-filled rather than acting as a payment processor itself, which keeps users on the apps they already trust and avoids handling funds in-app.
Members store their payment handles a single time so friends can send or request money without re-asking, reducing settlement to a tap.
Costs can be split evenly or manually, and the app records who paid and what each person owes, so the balance for every group member stays accurate.
Why the stack fits this product.
Flutter suits a feature-identical app on both platforms — the same expense, split, and settlement screens render natively on iOS and Android from one codebase, which is efficient for a focused product like a bill splitter.
Information not available in source documents.
Information not available in source documents.
The app's real, listed features.
Users create groups and log shared or group expenses for trips, roommates, dinners, rent, and utilities.
Bills can be split evenly or manually across the group.
A single tap launches the selected payment app — PayPal, Venmo, Cash App, or Apple Pay — with the amount and recipient pre-filled.
Users save their payment usernames once so friends can send or request money without re-asking.
The app tracks who paid and what each person owes and shows detailed logs of all group transactions.
Engineering detail behind the experience.
Single Flutter codebase for iOS and Android, organized around groups, members, expenses, and a settlement layer that computes balances.
A group/member/expense model with per-person balances and saved payment-username profiles; specific storage details are not available in source documents.
Information not available in source documents.
Yes—and for a money app that matters. Per Spendulge's Play data-safety listing, it reports no data collected, no data shared with third parties, and data encrypted in transit, and settling up runs through your own P2P payment apps rather than storing card details inside Spendulge.
Mobilions delivered and shipped Spendulge on both the App Store and Google Play in 2025. Specific business outcomes beyond the live release are not available in source documents.
A look at the product across screens.
If you need a fintech, expense-splitting or money app with clean group logic and one-tap settlement, let us show you how we would build it.
Mobilions' clients describe fast delivery, clear communication, and senior, trustworthy engineering—in their own words.
Great experience working with this team. They completed the development work quickly and efficiently without wasting time. Communication was clear and consistent, they understood the requirements well, gave smart suggestions, and delivered exactly as discussed. I'd highly recommend them to anyone looking for a reliable, fast, and skilled app development team.
We worked with Ankit, Mayur, and Tushar to build the first version of Baba Hebrew for iOS and Android, and they delivered super fast. The team was responsive, reliable, and efficient, taking the idea from zero to a working app in record time. I'd recommend them to anyone who wants to get an MVP live quickly.
Tushar and Ankit did an outstanding job developing our native iOS (Swift) and Android (Kotlin) apps. They were efficient, responsive, and technically strong throughout. Thanks to their work, we launched successfully and gained over 1,000 users in the first 30 days. Highly recommend this team for quality mobile app development.
It was a wonderful experience working with Tushar, Ankit, and their team. They built a great mobile app for me and truly brought my vision to life. What stood out was not just their technical skill but their attitude: always positive, solution-oriented, and incredibly patient. They went above and beyond at every step, finding creative workarounds and staying committed even when things got challenging. Extremely professional and trustworthy. I would absolutely hire them again.
Great experience working with this team. They completed the development work quickly and efficiently without wasting time. Communication was clear and consistent, they understood the requirements well, gave smart suggestions, and delivered exactly as discussed. I'd highly recommend them to anyone looking for a reliable, fast, and skilled app development team.
We worked with Ankit, Mayur, and Tushar to build the first version of Baba Hebrew for iOS and Android, and they delivered super fast. The team was responsive, reliable, and efficient, taking the idea from zero to a working app in record time. I'd recommend them to anyone who wants to get an MVP live quickly.
Tushar and Ankit did an outstanding job developing our native iOS (Swift) and Android (Kotlin) apps. They were efficient, responsive, and technically strong throughout. Thanks to their work, we launched successfully and gained over 1,000 users in the first 30 days. Highly recommend this team for quality mobile app development.
It was a wonderful experience working with Tushar, Ankit, and their team. They built a great mobile app for me and truly brought my vision to life. What stood out was not just their technical skill but their attitude: always positive, solution-oriented, and incredibly patient. They went above and beyond at every step, finding creative workarounds and staying committed even when things got challenging. Extremely professional and trustworthy. I would absolutely hire them again.
Common questions about building an app like Spendulge.
Yes. Spendulge was built for both platforms from a single Flutter codebase, so group expenses, splits, and settlement work the same on iOS and Android.
Spendulge does not hold funds. It launches an external P2P payment app — PayPal, Venmo, Cash App, or Apple Pay — with the amount and recipient pre-filled, so settlement happens in the app the user already uses.
Yes. Costs can be split evenly or manually, and the app records who paid and what each person owes.
No. Payment usernames are saved once, so friends can send or request money without re-asking.
The listing supports PayPal, Venmo, Cash App, and Apple Pay for settlement.
Yes—and for a money app that matters. Per Spendulge's Play data-safety listing, it reports no data collected, no data shared with third parties, and data encrypted in transit, and settling up runs through your own P2P payment apps rather than storing card details inside Spendulge.
The product is feature-identical on both platforms, so a single Flutter codebase keeps iOS and Android in sync and is efficient for a focused app like a bill splitter.
It depends on scope. For a bill-splitting app like Spendulge, the timeline is driven by the shared-expense data model — tracking who paid, who owes what, and even-or-manual splits across a group — and by the one-tap settlement flow that deep-links into PayPal, Venmo, Cash App, and Apple Pay with the amount and recipient pre-filled. Getting those calculations and hand-offs right is the bulk of the work, not the screens. We give a realistic timeline after a short discovery call.
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