Currenci

A currency converterthat adds your card fee

Type a price, pick your card's fee, and see what you'll really pay. CurrenciX is free, private and open source, for Android 13 and later.

Get the source code See every feature

The first release is on its way to GitHub Releases and F-Droid.

USD EUR

EUR

Your card's fee
Mid-market
€ 89.34
Card fee
+ € 2.23
You pay
€ 91.57

The converter, part by part

Your pair, and a swap

Two pills pick the currencies; the round button turns them around.

The true cost

Your card's fee, counted in. The stamp says how much it adds.

Recent pairs

The pairs you used last, under the result, to switch back in one tap.

Currenci
USDEUR

$ 100.00

At 0.8934€ 89.34
With your card€ 91.57
USD → AUDEUR → USD

Shortcuts on top

The rate chart, the cart, quick conversions and your history, one tap away.

Sums before you convert

Add up a bill or take a percentage off; the line above the amount shows the sum.

A keypad made for money

Brackets, percent and a brass rail of operators. Try it: the keys work.

A cart for the whole trip

Every price in the currency you think in, with tip, split and budget. Open a row to see what the app does with it.

On a phone

Taken on an Android phone, in the app's own paper-and-ink colours.

The converter on a phone: 1 US dollar is 0.893 euro, and 0.916 euro with a 2.5% card fee stamped beside it, over the keypad.
The converter, with a 2.5% card fee
Quick conversions: 1 to 1,000 dollars in euros, each with the 2.5% fee counted in, based on Frankfurter.app.
Quick conversions, fee included
A shopping cart: steak, fries and beer in dollars and euros, a 10% tip, a 2.50% conversion fee, 181.32 euros in total, split between Jordan and Nick, 58.68 left in the budget.
A cart, split between two
A year of the dollar against the euro: up 3.74% from 0.861 to 0.893, with the maximum, minimum, average and median.
A year of rates

And the rest of what it does

Rates from eight sources, a cart for the trip, and a phone that stays yours.

Every feature, explainedThe rate providers

Rates

  • Eight providersECB to Bank of Israel
  • A fallback providerWhen one is down
  • Past dates' ratesBack to 2010
  • ChartsA week to ten years
  • Rate alertsChecked on the phone

Converting

  • Paste a priceAmount and currency
  • From any appText selection menu
  • Starred currenciesYour own order
  • Compare cardsCheapest first
  • Quick conversionsRound amounts

The cart

  • Receipt scanningOn the phone
  • TripsDates, budget, checklist
  • Share and exportText, image, CSV, PDF

On your phone

  • Wallpaper coloursOr paper and ink
  • ThemesLight, dark, black
  • Languages32
  • Widget, tile, shortcutsHome screen
  • Tablets and foldablesTwo panes

Privacy

  • Ads, analytics, accountsNone
  • App lockFingerprint or PIN
  • Private requestsLook like anyone's
  • BackupsEncrypted, to your file

Open, and checked on every change

Every line is on GitHub. Each change runs Android Lint, detekt, Qodana, fuzz tests and the tools below before it's merged; the OWASP audit runs weekly.

GPL 3.0Free software, all of it
F-Droid readyNo proprietary libraries
CodeQLCode scanning
SemgrepSecurity rules
GitleaksNo secrets in the code
ScorecardOpenSSF supply chain
OSV-ScannerKnown flaws in every library
OWASPWeekly dependency audit

There's no release yet, but you can build it today on any computer with Java 21.

See how to build itWatch for releases