In short: A genuinely free budget app asks for no account and no bank access, and is honest about how it funds itself. Check five points: really free, usable without login, no forced cloud, what happens to your data, and whether it's built for couples. Kontoo needs no account and no bank access, keeps your budget data on your device (local-first), and is completely ad-free.
Plenty of budget apps say “free” in the store, yet you often pay anyway — with your data, by granting bank-account access the app doesn't really need, or through a subscription that only appears after the trial. If you just want to organise your spending and split a shared budget, it pays to check what an app actually demands and how it earns its money before you install it. This page lists five simple questions — explained neutrally — and shows how Kontoo answers them.
Is it really free? Watch for a “free version” that locks after a few weeks, or a subscription that only surfaces after the trial. Truly free means: usable long-term at no cost.
Do you need an account or login? Many apps force registration and an email address. Without an account the barrier stays low and no user profile is built at a provider.
Does the app want bank-account access? It sounds convenient but grants deep data access. For plain budgeting it's enough to enter expenses yourself or import a CSV file.
What happens to your data? Cloud storage means your financial data sits on someone else's servers. Local-first means everything stays on your device and you keep control.
How is it funded, and does that touch your data? Free apps have to earn money somehow — often through ads or by analysing usage. Look for an app that is transparent about this and, above all, keeps your financial data off its servers.
Built for couples or a shared flat? If you budget together you need fair splitting — by income, evenly, or a fixed amount — not just a single-person view.
Kontoo asks for no account and no bank access, keeps your budget data on your device (local-first), and splits fairly for couples and shared flats. It is completely ad-free. Try it for free now — nothing to install, no sign-up.
Building software costs money, so even a free app has to fund itself somehow. With many free apps this happens indirectly: through advertising, through selling or analysing usage data, or through extra features you have to buy later. That isn't inherently dishonest, but you should know what you are paying with — and whether the funding model reaches into your data. For finance apps the data question is especially sensitive, because income, spending and savings goals are highly revealing information. The honest question is not just how much the app costs, but what you pay with when no price is shown.
Bank access: convenient, but not required
Apps that connect directly to your bank account feel comfortable because transactions appear automatically. The price is deep access to sensitive account data, often through a third-party service. For the actual goal — an overview of spending and a shared, split budget — that access is not essential. Expenses can also be entered manually or imported as an exported file from online banking. That way control over the bank connection stays with you, and the app needs no permanent link to your bank.
Local-first as the basis for privacy
Local-first means your data lives first and permanently on your own device, not on a provider's server. This lowers the risk of data leaks, keeps you independent of a running cloud service, and fits the privacy mindset well. It also means the app's funding model — even one based on ads — never needs your financial figures, because those figures never leave your device in the first place. If you still want to sync across several devices, an end-to-end encrypted sync option serves you better than an open cloud: only your own devices can read the data. What matters is that the app works fully without sync and that syncing stays voluntary.
Education, not advice. How we work and check figures: Editorial. Figures as of 2026, last reviewed 07/04/2026.
Frequently asked questions
Is Kontoo really free?
Yes, Kontoo is free to use. There is no forced trial that locks afterwards, and the app is completely ad-free.
Do I have to register or create an account?
No. Kontoo needs no account and no login. You can start right away without providing an email address or password.
Does the app get access to my bank account?
No, bank access is not required. You enter expenses yourself or import them as a file or CSV from your online banking.
Where is my financial data stored?
Local-first: your data stays on your device and does not automatically go to a cloud. Optionally there is an end-to-end encrypted device sync that only you control.
How is Kontoo funded, and does that affect my data?
Kontoo is completely ad-free. The project plans to fund itself through a premium version of the native iOS/Android apps. Either way, your financial data stays on your device — the app does not send your income, spending or savings figures to a server.
Is the app suitable for couples and shared flats?
Yes. You can fairly split a shared budget — by income, evenly, or with a fixed amount — and keep pots and savings goals together.
All lessons · Glossary · Editorial · Kontoo does the math and explains – this is general education, not tax, legal or financial advice.
Your data stays with you. Full stop.
Kontoo collects, sees and stores none of your personal data. No account, no cloud.
