Autostack
Passive Bitcoin investing, powered by spare change
weeks from kickoff to MVP launch
auto-buy threshold for Bitcoin purchases
core account connections in the user flow
custody of user funds or crypto by the platform
- COUNTRY United States
- INDUSTRY FinTech
- PEOPLE INVOLVED 3
The Problem
Most people interested in Bitcoin never get started because the experience still feels too manual, too technical, or too risky. Traditional crypto apps are built around charts, trading, and constant decisions. That works for active users, but not for someone who just wants to build a position quietly over time.
At the same time, the idea of investing spare change is appealing, but trust becomes a major issue the moment a platform touches user money. AutoStack needed to remove that friction completely by keeping the experience simple, automated, and non-custodial from day one.
The Solution
We used our 4-Step MVP Framework to design and launch a lean mobile MVP that lets users connect their bank account, track spare change from card purchases, and automatically buy Bitcoin once their round-up balance reaches a set threshold.
The product was built around one simple loop: spend money, accumulate spare change, auto-buy Bitcoin, repeat. To keep the experience as frictionless as possible, we launched with Kraken integration as the fastest path to market, while Coinbase integration is now being developed as the next step.
Key Features
Account & Exchange Integration
➔ Secure bank connection via Plaid for transaction monitoring
➔ Exchange connection through OAuth-based integration
➔ No custody model: AutoStack never holds user funds or crypto
Round-Up Engine
➔ Tracks debit card purchases in real time
➔ Rounds each purchase up to the nearest dollar
➔ Stores round-up value until it reaches the $5 trigger
➔ Automatically executes a BTC buy in the user’s linked exchange account
Simple Setup & Dashboard
➔ Clean onboarding with email or OAuth login
➔ Guided account connection flow for bank and exchange
➔ Dashboard showing current round-up balance, total BTC accumulated, and recent activity
➔ Manual pause/resume control for automation
Security & Trust Layer
➔ Clear messaging that the app never touches user funds
➔ Token-based access only, no direct custody or transaction mediation
➔ Secure storage of logs and permissions with Supabase and RLS
Impact
The MVP is now live and validating a very specific behavior: whether casual users want to build a Bitcoin position passively, without trading, charts, or complex decisions.
For first-time crypto users ➔ Lowers the barrier to entry by turning investing into an automated background habit
For passive investors ➔ Removes the need to time the market or actively manage buys
For the product team ➔ Validates trust, setup completion, and automation behavior before expanding integrations and features
Let’s build your MVP together
We’ll guide you through planning, building, and launching your product—reach out today.