DumberKit: Calculator 1.1.0

DumberKit: Calculator gets a currency converter.

New

• Currency tab before the settings (dollar and yen icon): about 30 currencies at the reference rates of the European Central Bank, with the same two rows and keys as the unit converter – digits and # type the amount, ↑ / ↓ pick the row, OK lists all currencies, * swaps them
• The rates are downloaded when you open the tab and the ones on the phone are a few hours old, or from the menu; nothing runs in the background. Offline the converter keeps working with the last rates, a copy that comes with the app covers the very first start. The line under the converter shows when the rates were downloaded
• The app now asks for internet access – used only to download the ECB's rates

Fixed

• The warning "You are using a fake version of the app", which showed up now and then, is gone
• The selected button in dialogs is much easier to see
• On phones with an on-screen navigation bar the tabs and the last rows of About stay above it

Install dumberkit-calculator.apk over the previous version, your settings stay. Requires Android 8.0 or newer.

v1.0.0

The first public release of DumberKit: Calculator – a calculator and unit converter for keypad phones (Qin F21, Dumber Mini, Doov R77 Pro and similar), built on Fossify Calculator. No on-screen buttons: you type the calculation straight on the keypad.

Highlights

• Digits type numbers, * adds an operator and turns it into the next one (+ − × ÷), # is the decimal point, OK or the green Call key shows the result
• The usual order of operations and exact decimals (10 − 2 + 3 = 11, 0.1 + 0.2 = 0.3)
• Hold * for a palette of symbols laid out like the keypad: powers, square roots, parentheses, percent, ±
• History like a paper tape, ↑ / ↓ go through it; it's cleared when you close the app
• Calculator, unit converter and settings in tabs switched with ← / →
• Unit converter for length, area, volume, mass, temperature, time, speed, pressure and energy, in both directions
• System, light, dark, dark red and custom themes; blue icon by default, any other color can be picked
• Touch is off inside the app so nothing gets pressed by accident (can be turned on in Settings)
• Small (3.2 MB), no ads, no tracking, no internet access

Download dumberkit-calculator.apk below. Requires Android 8.0 or newer. See the README for the full guide to the keys.