Comparison

Convert Units vs Critica

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

Head to head
About

Convert Units

Easily convert between metric and imperial units for everyday needs. Offers a wide range of converters including currency, temperature, and length, with offline access and a favorites list for quick use.

Highlights
  • Metric to imperial conversions
  • Offline access
  • Favorites list
  • Currency exchange rates
  • Convert to fractions
  • Up to eight significant digits
Features
Read full description

Need to convert a unit from metric to imperial or vice versa? Our most talented developers have created this quick and straightforward to use converter app with a comprehensive range of conversions like miles to kilometers, kilograms to pounds, dollars to euros and celsius to Fahrenheit. Whether you're at the supermarket, on a train, or at a restaurant, you can access many calculators at your fingertips, making everyday conversions simple, both online and offline. FEATURES - Many currencies with live exchange rates - Easy to use interface - Create a conversion favorites list for quick access - Access unit conversions offline when on-the-go - Switch between conversion units with one click - Convert to fractions - Obtain conversion results with up to eight significant digits CONVERTERS - Weight Converter (kilograms, pounds, stones, grams, ounces, and more) - Temperature Converter (Celsius, Fahrenheit, Kelvin, Rankine, and more) - Currency Converter (over 160 currencies with live exchange rates) - Length Converter (miles, kilometers, feet, yards, centimeters, inches, and more) - Area Converter (Square feet, square meters, hectares, square kilometers, and more) - Volume Converter (US & UK Gallons, liters, US pints, UK pints, cubic feet, and more) - Speed Converter (miles per hour, kilometers per hour, meters per second, and more) - Time Converter (seconds, minutes, hours, and days) - Angle Converter (Milliradians, sign, seconds, radians, degrees, and more) - Pressure Converter (Pascals, inches of mercury, bar, inches of water, torrs, and more) - Energy & Power Converter (calories, therms, newton-meters, kilowatt-hours, and more) ————————————— Download today and Enjoy! —————————————

About

Critica

This app provides critical annotations for Islamic texts, including the Quran, Hadith, Sira, Fiqh, and Tafsir. It flags and explains issues like violence, misogyny, and historical errors, citing specific sources for verification. Designed for readers seeking a deeper, critical understanding of Islamic tradition.

Highlights
  • Annotated Quran (Meccan/Medinan)
  • Six Sunni & Twelver Shia Hadith collections
  • Event-based biography of Muhammad (Sira)
  • Classical jurisprudence (Fiqh) on contested topics
  • Major classical Tafsir commentaries
  • Source citation for every claim
  • Filterable flags for critical issues
Features
Read full description

Critica is a critical-edition reference covering the full primary sourcebase of Islam across five tabs: • QURAN — All 114 surahs, grouped Meccan / Medinan, with section-by-section annotations. • HADITH — The six Sunni books (Bukhari, Muslim, Abu Dawud, Tirmidhi, Nasa'i, Ibn Majah) and the Twelver Shia al-Kafi, with the most consequential and most-cited narrations. • SIRA — Muhammad's biography by event cluster — Mecca, Hijra, Badr, Uhud, the Jewish-tribe encounters, Khaybar, the conquest of Mecca, the Farewell Sermon. • FIQH — Classical jurisprudence on contested topics across the four Sunni madhabs (Hanafi, Maliki, Shafi'i, Hanbali) and the Twelver Ja'fari school: apostasy, marriage age, hudud, polygamy, jizya, FGM, and more. • TAFSIR — Major classical exegetes (Tabari, Ibn Kathir, Qurtubi, Razi, Tabarsi, Zamakhshari) with their distinctive readings of famous verses. Every flag is sourced. Each section cites a specific ayah (Q surah:verse), a hadith number (Bukhari 5134), a sira page (Ibn Hisham 2:240), or a madhab manual (al-Mughni 9:486) so a curious reader can verify the claim in any translation. The eleven flag categories: • Violence • Misogyny • Slavery • Hostility to unbelievers • Anti-LGBTQ teaching • Harm to children • Scientific errors • Historical errors • Contradictions • Moral problems • Logical issues Filter by flag to focus on one kind of issue at a time. Tap any flag to expand its full annotation. The reading level is middle-school to high-school. The tone is editorial, not polemical — the reader assumed throughout is someone who was told the tradition was perfect and noticed otherwise, and wants substantive engagement with what mainstream critical scholarship has actually said. SOURCES Patricia Crone, Michael Cook, John Wansbrough, Gerd-R. Puin, Christoph Luxenberg, Tom Holland, Robert G. Hoyland, Fred Donner, Joseph Schacht, G.H.A. Juynboll, Ignaz Goldziher, Jonathan Brown, Wael Hallaq, Ibn Warraq, and the Skeptic's Annotated Quran. Classical sources cited directly include the Six Books of Sunni hadith, al-Kafi, Ibn Hisham's recension of Ibn Ishaq, al-Tabari's history, and the classical tafsirs of Tabari, Ibn Kathir, Qurtubi, Razi, Tabarsi, and Zamakhshari. Critica is the Islamic-tradition companion to Decanon (the same critical-edition treatment applied to the Protestant Bible).

Screenshots

Convert Units4 screens
Critica4 screens

Verdict

The call

The clearest difference is rating: Critica at 5.0 against Convert Units's 1.0. Critica also leads on ads (none vs shown). Convert Units's advantage is in-app purchases (none vs 1) and ratings volume (3 vs 1). On price and device support there is nothing between them.

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

CostPrice · In-app purchases · Ads · Monetization

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

ReceptionRating · Positive reviews · Number of ratings

Critica holds the better App Store score, 5.0 against 1.0. Both are backed by a comparable volume of ratings — 3 and 1 respectively.

Scorecard6 real differences · 4 level
Convert Units versus Critica: the parameters behind the verdict, then further details
ParameterConvert UnitsCritica
PriceFreeFree
Rating1.0 (3 ratings)5.0 (1 ratings) — better
Positive reviews0.0% of reviews—
Number of ratings3 — better1
Update frequency—Monthly
AdsYesNo — better
In-app purchasesNo — betterYes
MonetizationAd-supportedFree — better
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS10.0 — better17.0
Further details — not scored
Size9 MB19 MB
Age rating4+17+
DeveloperSK Studios LtdOMAR DANIEL GRAZIANO

Customer experience

Convert Units

All ratings3 ratings
Positive0.0%
Neutral0.0%
Negative100.0%
Written reviews4 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

Critica

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Convert Units

No in-app purchases

1 purchases

Critica

One-time1
  • Full Access$9.99

Questions

Is Convert Units free?
Convert Units is free to download, with no in-app purchases.
Is Critica free?
Critica is free to download, with in-app purchases available.
Which has better reviews, Convert Units or Critica?
Critica is rated higher. Convert Units averages 1.0 out of 5 from 3 ratings, while Critica averages 5.0 from 1 ratings.
Do Convert Units or Critica have ads?
Convert Units shows ads; Critica does not.

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