Comparison

PDF Reader vs Unit Converter & Dictionary

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

Head to head
About

PDF Reader

This utility app allows users to open and manage various file formats, including PDFs, Docs, PPTs, and Excels. It offers powerful search capabilities, clear viewing options with annotation browsing, and easy sharing and printing of documents. Enjoy a high-speed, stable experience with a convenient night mode for reading in low light.

Highlights
  • Full-text PDF search
  • Annotation browsing
  • Outline support
  • Document sharing and printing
  • High-speed viewing
  • Night mode
Features
Read full description

PDF Reader - EZ Read PDF has become an indispensable application for daily study and life, which can open files in various formats. Key-Features At A Glance: • POWERFUL SEARCH: ∙ Full-text-search your entire PDF library. ∙ Search inside specific documents with easy navigation through the search results. • CLEAR VIEW: ∙ Easily browse through all your annotations. ∙ Full PDF outline support. You can even search the outline. ∙ Get an overview of all your bookmarked or annotated pages just with a single tap. • SHARE and PRINT: ∙ Easily share your annotated documents with your friends or co-workers. ∙ Print your annotated and edited PDFs. ∙ You can even share or print single pages of a document. • HIGH SPEED and STABILITY: ∙ Rapid viewing of PDF documents. ∙ Smooth display of very large PDF files. • NIGHT MODE: ∙ Makes reading in the dark much easier on the eyes Subscription Terms and Details - Get unlimited access to all features - No ads: ① USD $9.99/week ② USD $29.99/year - The payment will be charged to your iTunes account at confirmation of purchase. - The subscription automatically renews unless auto-renew is turned off at least 24 hours before the end of the current period. - Subscription may be managed and auto-renewal may be turned off by going to Account Settings after purchase. - The account will be charged for renewal within 24 hours prior to the end of the current period. - Any unused portion of a free trial period will be forfeited when the user purchases a subscription to that publication. --- Terms of Use: https://pdfreader.vip/pdfreader-terms.html Privacy Policy: https://pdfreader.vip/pdfreader-privacy.html Web:https://pdfreader.vip/

About

Unit Converter & Dictionary

This app offers comprehensive unit conversion across numerous categories, including specialized and traditional units. It also functions as a dictionary, explaining unit meanings, pronunciations, and providing fun facts. Real-time currency conversion is available, with an optional premium plan for AI assistance and ad removal.

Highlights
  • Extensive unit conversion categories
  • Unit dictionary with pronunciation and facts
  • Real-time currency conversion
  • Offline conversion capabilities
  • AI support for app usage (Premium)
  • Traditional and specialized unit support
Features
Read full description

An app that both converts units and works as a dictionary explaining what each unit means. Useful for everything from converting units in class to checking currency before a trip abroad. ■ A wide range of conversion categories • Length, area, volume, mass, speed, temperature, angle, pressure, energy, power, force, density, fuel economy, data size, and more • Includes lesser-known units too — traditional Japanese units, imperial units, nautical miles, carats, horsepower ■ Unit dictionary • Search across unit names, aliases, and symbols • Look up how a unit is pronounced, its rough scale, and fun facts • Jump straight from a search result into conversion mode ■ Currency conversion • Real-time currency conversion using up-to-date exchange rates ■ Built to be easy • Conversion and dictionary lookups work entirely on your device (only currency conversion needs a connection, to fetch exchange rates) ■ AI support (Premium) • Ask about units and conversion settings. Supported controls help prepare conversion; results are calculated by the app, not generated by AI. ■ Premium plan • AI help with app usage and supported actions • Up to 30 successful external AI responses per app and subscription each day; resets at midnight Japan Standard Time • AI requires an internet connection and consent to send data • Ads removed Good for: converting recipe measurements, studying science and math, or checking currency and units before an overseas trip. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

PDF Reader4 screens
Unit Converter & Dictionary4 screens

Verdict

The call

The clearest difference is rating: Unit Converter & Dictionary at 5.0 against PDF Reader's 4.0. PDF Reader's advantage is ratings volume (22 vs 1). On price, update cadence, ads and in-app purchases 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. PDF Reader sells 2 in-app purchases, starting at $9.99 per 7 days and Unit Converter & Dictionary sells 1 in-app purchase, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Unit Converter & Dictionary holds the better App Store score, 5.0 against 4.0. That said, the two scores are not equally well evidenced: PDF Reader has 22 ratings behind it against 1, so its average is the more settled of the two.

UpkeepUpdate frequency

PDF Reader ships an update every 2 weeks, Unit Converter & Dictionary every 3 weeks. The most recent releases landed on October 30, 2026 and October 31, 2026 respectively.

Scorecard2 real differences · 8 level
PDF Reader versus Unit Converter & Dictionary: the parameters behind the verdict, then further details
ParameterPDF ReaderUnit Converter & Dictionary
PriceFreeFree
Rating4.0 (22 ratings)5.0 (1 ratings) — better
Positive reviews0.0% of reviews—
Number of ratings22 — better1
Update frequencyEvery 2 weeks — betterEvery 3 weeks
AdsYesYes
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPodiPhone, iPad, iPod — better
Requires iOS15.015.0
Further details — not scored
Size42 MB13 MB
Age rating17+4+
Developer欣 翁Mikoto Gateway

Customer experience

PDF Reader

All ratings13 ratings
Positive69.2%
Neutral15.4%
Negative15.4%
Written reviews1 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

Unit Converter & Dictionary

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

In-app purchases

2 purchases

PDF Reader

Subscriptions2
  • weekly$9.997 Days
  • yearly$29.991 Year
1 purchases

Unit Converter & Dictionary

Subscriptions1
  • プレミアムプラン$0.991 Month

Questions

Is PDF Reader free?
PDF Reader is free to download, with in-app purchases available.
Is Unit Converter & Dictionary free?
Unit Converter & Dictionary is free to download, with in-app purchases available.
Which has better reviews, PDF Reader or Unit Converter & Dictionary?
Unit Converter & Dictionary is rated higher. PDF Reader averages 4.0 out of 5 from 22 ratings, while Unit Converter & Dictionary averages 5.0 from 1 ratings.
Do PDF Reader or Unit Converter & Dictionary have ads?
Both PDF Reader and Unit Converter & Dictionary show ads.
Which is updated more often, PDF Reader or Unit Converter & Dictionary?
PDF Reader ships an update every 2 weeks, and Unit Converter & Dictionary every 3 weeks. Most recently, PDF Reader was updated on October 30, 2026 and Unit Converter & Dictionary on October 31, 2026.

Other comparisons