A multi-currency life used to be unusual. Now it’s ordinary: you get paid in one currency, pay rent in another, hold savings in a third, and travel through a fourth. Remote workers, people who moved countries, frequent travelers, multi-region investors — the door is wide.
And most budget apps quietly fall apart at it. They were built for one currency. Add a second and the totals go wrong, the exchange rates go stale, or the only way to see everything together is to hand every account to a foreign bank aggregator and hope the conversions line up.
This is a comparison of how the main options actually handle a multi-currency life — bank-linking apps, cloud-backed trackers like Finly and Cognito Money, and on-device budgeting in Thrust — and which one fits which situation.
Why Multi-Currency Quietly Breaks Most Apps
Single-currency budgeting is simple math. Multi-currency is three problems stacked:
- Conversion — every balance and transaction has to be expressed in a base currency to total it, using a rate that changes by the minute.
- Truth — you still need to see the original amounts. “€1,200 rent” should not silently become “$1,287.34 rent” and lose the fact that it was a fixed euro amount.
- Budgeting across currencies — a budget that only understands one currency can’t tell you whether you overspent this month when half your spending happened abroad.
Apps built for one currency bolt on a conversion later and get the first problem half-right while ignoring the other two. The result is totals you don’t trust — which defeats the entire point of a budget.
The Options, Honestly
Bank-linking apps (Plaid-based)
The big cloud apps can aggregate foreign accounts in theory, but multi-currency is where aggregation gets thin. Coverage outside the US is patchy, conversions are often applied opaquely, and you are back to the core trade-off: to see your money in one place, you hand every account — domestic and foreign — to an aggregator that holds persistent read access. In 2022 the FTC ordered Plaid to pay $58 million over how much transaction data it collected. For a life spread across countries, you are multiplying that exposure across every institution you touch.
Finly
Finly is a privacy-positioned, manual-entry tracker for iPhone and Android, and it lists multi-currency support in its paid tier. No bank linking is a genuine win. The trade-off is in the architecture: cloud backup is part of the paid plan, so your data syncs off the device, and it runs on a subscription. If cross-platform and cloud sync suit you, it’s a reasonable option.
Cognito Money (SenticMoney)
Cognito Money — now SenticMoney — keeps data local on a desktop, which is genuinely private storage, and imports statements by CSV and PDF. But it’s desktop-first (Windows and Mac), and its AI assistant runs on a third-party cloud model, so questions about your money go out to be answered. If you do your finances at a desk rather than on a phone, it’s worth a look.
Thrust
Thrust treats multi-currency as a first-class part of the model, not a bolt-on — and it does it entirely on-device. 20+ currencies with live exchange rates, automatic conversion to your base currency, and multi-currency budgets that understand spending across currencies. Every original amount is preserved; the conversion sits on top, it doesn’t overwrite the truth.
No bank linking, no aggregator, no cloud database. Ghost Mode guarantees no financial data leaves the phone. The rates refresh when you’re online; the budgeting, totals, and on-device AI work even when you’re not — useful precisely when you’re abroad on a foreign SIM or no signal at all.
Side by Side
| Bank-linking apps | Finly | Cognito Money | Thrust | |
|---|---|---|---|---|
| Currencies | Varies, US-centric | Multi-currency (paid) | Manual / import | 20+ with live rates |
| Multi-currency budgets | Limited | Basic | Manual | Yes, native |
| Bank linking | Required | No | No | No |
| Where data lives | Aggregator + cloud | App’s cloud | Local (desktop) | Your iPhone only |
| Works offline | No | No | Partly | Yes |
| Platform | iOS/Android/web | iOS/Android | Windows/Mac | iPhone (native) |
| Beyond cash | Varies | Limited | Limited | Crypto (18 chains), stocks, real estate |
Multi-Currency the Way It Should Work
In Thrust, a multi-currency life looks like this:
- Hold accounts in different currencies — a euro checking account, a dollar savings account, a balance in your home currency — each shown in its own currency, totalled in your base.
- Spend abroad without losing the thread — log a purchase in the local currency; the original amount stays, the conversion is applied with a live rate.
- Budget across the whole picture — multi-currency budgets tell you whether you actually overspent this month, not just whether one currency’s column looks fine.
- See assets too — 18 blockchains of crypto, stocks and ETFs (via third-party APIs, in preview), real estate, and alternative assets, each in its currency, all in one private view.
- Ask the AI CFO — “how much did I spend at home versus abroad?” — answered on-device, with nothing uploaded.
The point isn’t just that it converts currencies. It’s that it converts them without sending your finances anywhere to do it.
Who Should Choose What
Use a bank-linking app if:
- Your accounts are mostly in one country and automatic sync matters more than privacy
- You’re comfortable with an aggregator holding read access to every account
Use Finly if:
- You want a cross-platform (iOS + Android) manual tracker and cloud sync is fine
- Subscription pricing works for you
Use Cognito Money / SenticMoney if:
- You manage money at a desktop and want local file storage
- A cloud-AI assistant doesn’t bother you
Use Thrust if:
- You live across more than one currency and want budgets that actually understand that
- You want every conversion to happen on your iPhone, with nothing uploaded
- You’re in the Apple ecosystem and want native widgets, Live Activities, and Apple Pay capture
- You track assets beyond cash — crypto, stocks, real estate — in mixed currencies
The Bottom Line
Multi-currency is the test most budget apps fail quietly: the totals drift, the rates go stale, or the only way to unify your money is to hand it all to an aggregator. The apps that skip bank linking fix the worst of that — but most still sync your data to a cloud to do it.
Thrust closes the loop. Multi-currency budgets, live rates, and AI answers, all computed on the phone, none of it uploaded. For a life lived in more than one currency, the right tool is the one that handles the complexity without making your money travel further than you do.
Thrust is a privacy-first personal finance app for iPhone — 20+ currencies, multi-currency budgets, and an on-device AI CFO, with nothing uploaded. Download Thrust on the App Store.