Convertora converts units, ingredients and whole recipes — entirely offline, with no account. Answers to common questions are below, and we're always happy to help by email.
Getting started
Ten things, each with its own screen from the Home grid:
Yes — the search field at the top of Home takes a whole question. Type something like 250 g to oz, flour cup grams, or cups to grams and it will take you straight there. On a tablet or with a hardware keyboard attached, ⌘K opens it from anywhere on Home.
Always. Convertora never needs a connection — there's nothing to download and no server involved. On Android it isn't even granted internet permission.
Cooking & recipes
Open Ingredients from Home, pick your ingredient, then set the amount and the units. Flour, sugar, butter, rice and around fifty other common ingredients are included, each with its own density — because a cup of flour and a cup of sugar are not the same weight.
Because it's an estimate, and we'd rather say so. Ingredient weights vary with brand, moisture, sifting, and how firmly you pack the cup. Convertora marks every ingredient-derived figure as approximate — both on screen and to a screen reader — rather than presenting it as an exact measurement. Straight unit conversions, like grams to ounces, have a fixed factor and are shown without the ≈.
A "cup" isn't one size. Convertora supports the US cup, the metric cup and the imperial cup, and you can switch between them right on the conversion screen or set your usual one in Settings → Cup standard. If you're in the UK, new cooking conversions default to the metric cup. American recipes almost always mean the US cup.
Open Recipe Scaler, enter the recipe's original servings and how many you want, then add your ingredients. Every quantity rescales as you type. There are one-tap Half, Double and Triple buttons, and a Reset to go back to the original.
Yes. Open the ⋮ menu on that row and choose Convert unit. Nothing changes until you tap Replace, so scaling a recipe never silently rewrites your units. If the conversion crosses between weight and volume, link the row to an ingredient first so Convertora knows the density to use.
Yes — the share action hands the scaled recipe to your device's own share sheet, so you can send it by message, email, notes, or anything else you have installed.
Results, favourites and history
Yes. Settings → Fraction display lets you choose decimals, fractions, or Show both — which prints the decimal with the fraction in brackets after it, like 1.5 (1½). Fractions are offered on the families where cooks actually use them, and the fraction is only shown when it genuinely matches the decimal.
Settings → Decimal precision controls this. On automatic, Convertora picks a sensible number of places for the unit — and if a value would round away to zero, it shows enough significant figures for the answer to still mean something.
Tap the star on the conversion screen to add it to Favourites. In the Favourites tab you can rename them, pin the ones you use most to the top, give a favourite a default amount, and reorder or delete them.
Yes. Settings → History has a Record conversion history switch to stop it being recorded at all, and a Clear all history action to wipe what's already there.
Accessibility & appearance
Yes. Screens, controls and results carry proper accessible labels, results are announced when they change, headings are marked up so you can jump between them, and every action reachable by tapping is reachable by screen reader too. If you hit something that reads badly, please tell us — that's a bug worth fixing.
Settings → Accessibility has Larger controls for bigger buttons and touch targets throughout the app, and High contrast for stronger contrast on text, buttons and results. The app also follows your system text-size setting.
Yes — Settings → Reduce animations minimises screen transitions and motion. Convertora also respects your device's own reduce-motion setting.
Settings → Appearance lets you pick light, dark, or follow your system setting.
Accuracy & data
No. Convertora is built and tested for everyday household use — cooking, shopping, DIY. It must not be used for medical dosing, pharmaceutical or laboratory calculations, engineering safety work, or anything else where an error could cause harm. Use a purpose-built, validated tool for those. The full wording is in the app under Settings → Terms and disclaimer.
Because those are two different families of unit, and Convertora keeps them apart on purpose. MB, GB and TB are powers of ten (1 GB = 1000 MB — what drive manufacturers and most operating systems mean), while MiB, GiB and TiB are powers of two (1 GiB = 1024 MiB). Both are available; pick whichever your source is using.
Each ingredient's reference figure is recorded against one specific cup standard and, where possible, cited to a published reference — you can see which in Settings → Ingredient data information. Every other figure for that ingredient (grams per tablespoon, per teaspoon, per a different cup) is derived mathematically from that one reference, so the numbers can never quietly disagree with each other. Where an ingredient's state matters a great deal — sifted versus packed flour, loose versus packed brown sugar — it's stored as a separate entry rather than averaged into one misleading number.
Your data
No. There's no sign-up, no login, and no personal details of any kind. Convertora collects nothing about you.
Everything Convertora saves lives on your device only. Clear history from Settings, delete favourites and recipes from their own screens, or uninstall the app to remove all of it at once. There's no account to close and nothing held on a server. See the privacy policy for the full detail.
Only if your phone's own backup service includes them — Convertora has no cloud sync of its own, so it can't move your data between devices for you. Before switching phones, it's worth noting down anything you'd hate to retype.
support@cjdesigns.app — we usually reply within a day or two.
It helps to include your device, whether you're on iOS or Android, and the version number from Settings → About Convertora.