Comparison

Convertly vs Plain Units

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Convertly

Features
Read full description

A unit converter that is actually fast, and knows what things weigh. 13 categories, 124 units, and a real ingredient table: 112 foods with their proper densities, so a cup of flour and a cup of honey do not come out the same. No account, no sign-up, no waiting on a network. WHAT IT CONVERTS - Length, weight, temperature, volume, area, speed, time - Data, pressure, force, energy, power - Cooking, with grams, cups, tablespoons, teaspoons, millilitres and fluid ounces - Every result at once, so you do not pick the target unit before you can see the answer INGREDIENTS THAT WEIGH WHAT THEY WEIGH Flours, sugars, dairy and fats, liquids, nuts, grains, chocolate and fruit, each with real grams-per-cup. This is the part most converters get wrong. YOUR OWN INGREDIENTS No built-in table can know the specific flour you buy, your protein powder, or the starter in your fridge. Weigh one cup of it once, type the grams, and every conversion using it is right from then on. Free keeps three. CONVERTLY PRO - As many of your own ingredients as you want - Your full conversion history instead of the last 10 Converting is free and stays free. Favourites are unlimited and free. Nothing that was free in 1.0 moved behind the subscription. Convertly Pro is $2.99 per month or $19.99 per year, with 14 days free on the yearly plan. Payment is charged to your Apple Account at confirmation of purchase. Your subscription renews automatically unless it is cancelled at least 24 hours before the end of the current period. Manage or cancel any time in your Apple Account settings. Terms of Use: https://thedolceway.com/terms Privacy Policy: https://thedolceway.com/privacy

About

Plain Units

Features
Read full description

Simple Unit Converter is a calm, numeric-first converter that gets out of your way. Pick a category, type into any field, and every other unit on the page updates instantly. No account, no sign-in, no clutter. 14 CATEGORIES • Length • Mass • Temperature • Time • Speed • Area • Volume • Digital Storage • Data Transfer Rate • Energy • Frequency • Fuel Economy • Plane Angle • Pressure WHY YOU'LL LIKE IT • Type into any unit, not just a "from" box. Every other unit converts as you type. • All units in a category are visible at once, so you never dig through pickers. • Searchable category grid to jump straight to what you need. • Tap a result to copy a clean, paste-ready value. • Remembers your last category, unit, and value between launches. • Light and dark mode, and works on iPhone and iPad. • Everything runs on your device. No servers, no analytics, no tracking of your conversions. REMOVE ADS The free version shows ads. A one-time purchase removes them forever and restores on all your devices signed in to the same Apple Account.

Screenshots

Convertly4 screens
Plain Units4 screens

Verdict

The call

The clearest difference is in-app purchases: Convertly at none against Plain Units's 1. Convertly also leads on ads (none vs shown). Plain Units's advantage is update cadence (every 3 weeks vs every 5 months). On price, device support and iOS requirement there is nothing between them.

Scored on Price Ā· Rating Ā· Positive reviews Ā· Number of ratings Ā· Update frequency Ā· Ads Ā· In-app purchases Ā· Monetization Ā· Best chart rank Ā· Devices Ā· Requires iOS

CostPrice Ā· In-app purchases Ā· Ads Ā· Monetization

Both are free to download. Plain Units sells 1 one-off in-app purchase. Convertly asks for nothing beyond the download.

UpkeepUpdate frequency

Convertly ships an update every 5 months, Plain Units every 3 weeks. The most recent releases landed on October 25, 2026 and October 31, 2026 respectively.

Scorecard3 real differences Ā· 3 level
Convertly versus Plain Units: the parameters behind the verdict, then further details
ParameterConvertlyPlain Units
PriceFreeFree
Update frequencyEvery 5 monthsEvery 3 weeks — better
AdsNo — betterYes
In-app purchasesNo — betterYes
DevicesiPhone, iPadiPhone, iPad
Requires iOS17.016.4 — better
Further details — not scored
Size2 MB48 MB
Age rating4+4+
DeveloperDt novaNicolaus Lawson

In-app purchases

None

Convertly

No in-app purchases

1 purchases

Plain Units

One-time1
  • Remove Ads$3.99

Questions

Is Convertly free?
Convertly is free to download, with no in-app purchases.
Is Plain Units free?
Plain Units is free to download, with in-app purchases available.
Do Convertly or Plain Units have ads?
Plain Units shows ads; Convertly does not.
Which is updated more often, Convertly or Plain Units?
Convertly ships an update every 5 months, and Plain Units every 3 weeks. Most recently, Convertly was updated on October 25, 2026 and Plain Units on October 31, 2026.

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