Convertly — Support

Plain-text email, read and answered by a human. No ticket system, no bot.

Reporting a problem

So we can reproduce it rather than guess, tell us in your first message:

• your device and OS version (for example, iPhone 16, iOS 27.1);
• the app version, shown in Settings → About → Version — Settings → About → Contact support opens an e-mail with it already in the subject;
• what you entered, what you expected, and what you got instead — the tool's name helps (Length, Currency, Tip…).

What is the fastest way to convert something?

Type it on the Home screen: 72 F, 5 ft to cm, 12.5 kg in lb or $20 to EUR. Answers appear as you type; tap one to open the full converter with your value already in it. Inside a converter there is no "convert" button either — the result updates with every digit. Tap Pin to keep a conversion, units included, in the Favorites tab.

How do I enter a negative number?

Where a negative value makes sense — temperatures, percentage changes — the field has a +/− key next to it, because phone number pads have no minus sign. Quantities that cannot be negative, such as a length or a weight, do not accept one, and temperatures below absolute zero are refused with an explanation.

Why doesn't the amount match my bank or card?

Convertly shows indicative mid-market reference rates published by the European Central Bank. Your bank, card issuer, payment app or exchange office uses its own rate and usually adds a fee or a margin, so what you are charged will differ — sometimes by several percent. Use Convertly to know roughly what something costs, not to predict your statement.

How fresh are the exchange rates? Does the currency converter work offline?

The European Central Bank publishes its reference rates once per business day, around 4 PM Central European Time, and not on weekends or holidays — so the newest rates can be a few days old on a Monday morning. The app looks for new rates when you open the currency converter, at most every six hours; you can also ask for them in Settings → Currency → Update rates now, or by pulling the converter screen down.

Once rates have been downloaded, currency conversion works offline. The app then says "Offline · showing saved rates" with the date they were published, and warns you when they are getting old. If no rates have ever been downloaded on your phone, it shows no amount at all rather than a made-up one: connect once, and they are saved.

Which currencies are available?

The 30 currencies of the European Central Bank's reference list: the US dollar, euro, British pound, Canadian dollar, Mexican peso, Japanese yen, Chinese yuan, Indian rupee, Australian dollar, Swiss franc, South Korean won, Brazilian real, Hong Kong dollar, Singapore dollar, New Zealand dollar, Swedish krona, Norwegian krone, Danish krone, Polish złoty, Czech koruna, Hungarian forint, Romanian leu, Turkish lira, Israeli new shekel, South African rand, Thai baht, Indonesian rupiah, Malaysian ringgit, Philippine peso and Icelandic króna.

Do the unit converters and calculators need a connection?

No. Length, weight, temperature, area, volume, speed, pressure, energy, fuel economy, tips, bill splits, percentages, sales tax, time zones and size charts all work in airplane mode. Conversions use the exact legal definitions of each unit.

Can I change the number of decimals, or use commas?

Yes, in Settings → Numbers & units: the number format (1,234.56 or 1.234,56 or 1 234,56 — or whatever your phone uses), the maximum number of decimal places, US or metric units by default, and a 12- or 24-hour clock.

Where is my data? Is there an account?

There is no account — no e-mail, no password, no sign-in. Your history, favorites and settings are stored on your own phone, in the app's storage. We do not upload them and we hold no copy, so there is nothing for us to look up, restore or hand over. Settings → Your data → Export my data gives you all of it as a file. The full detail is in the Convertly Privacy Policy.

How do I clear or turn off history?

In the History tab, tap Clear to remove everything, or the trash icon on a single entry. In Settings → History you can turn history off and choose how long it is kept: 7 days, 30 days, 90 days (the default), 1 year or forever.

How do I delete everything?

Two ways, both immediate and complete:

• Settings → Your data → Delete all data — erases your history, favorites, settings and saved exchange rates from the device.
• Uninstall the app — takes its storage with it.

Once it is gone from your phone it is gone: we never had a copy. To reset the advertising identifier your device gives to ads, use your device settings (iOS: Settings → Privacy & Security → Tracking; Android: Settings → Privacy → Ads). See also Delete Account & Data.

Can I turn off personalized ads? Can I remove ads?

Turn off Settings → Privacy → Personalized ads and Google shows limited ads, chosen from the screen rather than from your activity elsewhere — it is also your "Do Not Sell or Share" choice under US state privacy laws. On iPhone, Apple's tracking prompt lets you refuse tracking as well. There is no paid ad-free mode, but you can pause ads: tap Watch a short video at the bottom of the Home screen and, once it has played, Convertly shows no ads at all for 24 hours. It is optional — every feature works the same either way. They never appear inside a converter or calculator, and a full-screen ad never interrupts what you are typing.

Why doesn't a size chart match a brand's?

Because there is no single standard: each brand cuts its own sizes, and the same label can fit differently from one maker to the next. Convertly's charts are common industry conversions — a good first guess. Before you buy, check the brand's own size chart, and measure your foot from heel to longest toe, standing, at the end of the day.

Where is Convertly available?

The United States only, in English. Its defaults — US customary units, US dollars, US date and time formats — are built for US users.

The legal documents

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