Tandem Currency

Name: Tandem Currency
Author: Richard Hope

Rates, fees & travel budgets

Coming soon

Screens

Take a look around.

Tandem Currency screenshot 2 (light mode)

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Tandem Currency screenshot 1 (dark mode)

Tandem Currency screenshot 2 (dark mode)

Tandem Currency screenshot 3 (dark mode)

Tandem Currency screenshot 4 (dark mode)

Tandem Currency screenshot 5 (light mode)

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Tandem Currency screenshot 7 (light mode)

Tandem Currency screenshot 8 (light mode)

Tandem Currency screenshot 5 (dark mode)

Tandem Currency screenshot 6 (dark mode)

Tandem Currency screenshot 7 (dark mode)

Tandem Currency screenshot 8 (dark mode)

What it does

Built around a few things done well.

Convert between 43 currencies on a proper number pad, and pin up to eight for quick comparisons.
See the date behind every rate, and chart its history over a month, three months or a year.
Check what fees really cost, and compare a provider's offered rate with the reference rate.
Set a trip budget and log expenses as you go; each one keeps the rate it was converted at.
Ask in your own words with Apple Intelligence on device, or convert with Siri and Shortcuts.
Works offline with saved rates, in light and dark, with no account, adverts or tracking.

Understand a price abroad, compare exchange fees and keep your travel spending in perspective. Tandem Currency brings clear currency conversion and a private travel journal together in one carefully designed app.

CONVERT CLEARLY Convert between 43 currencies with a dedicated number pad, familiar local number formats and an easy currency swap. Pin up to eight currencies for quick comparisons, save useful conversions and share a result with its reference date.

KNOW THE RATE See the date behind your conversion. Explore historical rates over one month, three months or one year, inspect a point on the chart, and compare the period's low, high and change. Previously fetched rates remain available offline, with clear cache and age information.

CHECK THE FEES Estimate the effect of percentage and fixed fees before you exchange. Compare a provider's offered rate with the reference rate and see how the final amount changes. A pocket price guide helps you get a feel for everyday prices.

KEEP YOUR TRIP IN VIEW Set a budget in your home currency and record expenses as you travel. Each expense keeps its original reference conversion, so later rate movements do not rewrite your spending history.

ASK IN YOUR OWN WORDS On eligible devices, Apple Intelligence can interpret a currency request privately on-device. Check the amount and currencies before applying the conversion. Rates and arithmetic come from the app, not from AI. Exact requests such as "120 EUR to GBP" also work without Apple Intelligence. Currency conversion actions are available in Siri and Shortcuts.

DESIGNED FOR WHERE YOU ARE Enjoy light and dark appearances, support for 16 languages, and layouts that adapt from iPhone to the paired workspace on iPhone Duo.

PRIVATE BY DESIGN No account, advertising or tracking. Saved conversions and travel entries are stored in the app on your device. Device backups may include this data according to your iOS settings.

Rates are fetched from Frankfurter and update daily. They are reference rates, not intraday trading prices or guaranteed bank, card or cash exchange quotes. Providers may use different rates and fees. Offline conversion requires rates to have been fetched previously. Apple Intelligence and Siri availability depends on your device, language and system settings.