Comparison

Converter AM vs PDF Vault

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

Head to head
About

Converter AM

This app converts units and currencies with a focus on simple user guidance. It allows for real-time conversion as you type and can also function as a basic calculator. The interface is designed to remain uncomplicated even with future optimizations.

Highlights
  • Real-time unit conversion
  • Currency conversion
  • Basic arithmetic calculator
  • Customizable units
  • Simple user interface
Features
Read full description

Dear reader, thank you for your interest in the app. I am happy to bring it closer to you. The app has been around since 2019. I am happy about the average rating of 4.5 to 5 out of 5 stars. There are several hundred people using it around the world, with Apple only showing the number that have given their consent. The main focus is on simple user guidance. In the future, I plan to further optimize the app for people who use it often, without sacrificing the simplicity. I would appreciate if you would install the app. You will then see that you can simply enter a number. Miles or kilometers are initially selected. The number is converted to the other unit as you type. You can change the default units via a button called "Unit". E.g. in kilograms and pounds. To do this, simply tap on the two units in the list one after the other, that's it. You can also use the app as a calculator with basic arithmetic commands. You can also hide the unit conversion for this, but you don't have to. Thank you for reading this description. The app is constantly evolving, but without making it more complicated, which isn't easy. Stability and quality are also important to me. Best regards Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

PDF Vault

This ultra-lightweight application offers a comprehensive suite of PDF tools, including text-to-speech functionality, digital signing, document scanning, organization, and instant translation. It's designed for efficiency and ease of use, saving device space while enhancing productivity for work, study, or personal tasks.

Highlights
  • Text-to-speech for PDFs
  • Digital document signing
  • Scan paper documents to PDF
  • Organize and manage PDF files
  • Instant document translation
  • Ultra-lightweight and fast
Features
Read full description

Your private PDF workspace, built for people who take their documents seriously. Ask your PDFs questions, understand complex documents, translate, scan, sign, listen, and manage your files in one lightweight app. PDF Vault combines powerful PDF tools with a privacy-first approach: your documents stay on your device. ASK YOUR PDF ANYTHING Have a long report, contract, research paper, manual, or other document? Just ask. Ask PDF lets you ask questions about the content of your document and get answers based on the information inside it. Find important details, understand complex sections, summarize information, and explore your documents without searching through page after page. Your documents stay private and are processed on your device. PRIVATE BY DESIGN Your documents are personal. PDF Vault is designed with privacy at its core. Your PDF data never leaves your device. No document uploads are required for the core PDF experience. Your files remain under your control while you work with them. ALL THE PDF TOOLS YOU NEED Listen to PDFs Turn your documents into spoken audio with built-in text-to-speech. Listen while working, commuting, studying, or simply when you prefer to hear rather than read. Translate PDFs Translate documents and understand content in other languages without leaving your PDF workspace. Scan documents Turn paper documents into digital PDFs using your device camera. Built-in OCR helps make scanned documents searchable and usable. Sign PDFs Sign documents quickly and conveniently. Add your signature and complete documents without printing them. Read and organize Open, read, manage, and organize your PDF files in a clean, focused workspace designed to stay out of your way. LIGHTWEIGHT AND FOCUSED PDF Vault is built to give you the tools you actually need without turning your device into a document-management maze. Whether you are working with contracts, invoices, academic papers, reports, forms, manuals, or personal documents, PDF Vault keeps everything you need close at hand. FOR WORK, STUDY, AND EVERYDAY DOCUMENTS Use PDF Vault at work to understand reports and contracts. Use it at university to explore research papers and study materials. Use it at home to manage forms, manuals, receipts, and other important documents. ONE PRIVATE WORKSPACE FOR YOUR PDFs Read. Ask. Translate. Scan. Sign. Listen. Organize. PDF Vault brings essential PDF tools together while keeping privacy at the center of the experience. PDF Vault Unlimited gives you unlimited access to all PDF Vault features while directly supporting our mission to provide the best privacy-first PDF tool where your data never leaves your device. Terms of Service: https://macmonsters.com/pdf-reader-terms-of-service.html

Screenshots

Converter AM3 screens
PDF Vault2 screens

Verdict

The call

The clearest difference is review sentiment: Converter AM at 67% against PDF Vault's 50%. Converter AM also leads on device support (5 vs 3) and iOS requirement (15.0 vs 18.1). 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. Converter AM sells 3 in-app purchases, starting at $0.99 per month and PDF Vault sells 2 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Converter AM ships an update every 2 weeks, PDF Vault fortnightly. The most recent releases landed on October 15, 2026 and October 12, 2026 respectively.

Scorecard3 real differences · 7 level
Converter AM versus PDF Vault: the parameters behind the verdict, then further details
ParameterConverter AMPDF Vault
PriceFreeFree
Rating4.7 (516 ratings) — better—
Positive reviews66.7% of reviews — better50.0% of reviews
Number of ratings516 — better—
Update frequencyEvery 2 weeksFortnightly — better
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPad, iPod, Mac, Apple Watch — betteriPhone, iPad, Mac
Requires iOS15.0 — better18.1
Further details — not scored
Size3 MB4 MB
Age rating4+4+
DeveloperAndreas MaierDmytro Skorokhod

Customer experience

Converter AM

All ratings516 ratings
Positive92.8%
Neutral2.9%
Negative4.3%
Written reviews18 reviews
Positive66.7%
Neutral11.1%
Negative22.2%

PDF Vault

Written reviews6 reviews
Positive50.0%
Neutral16.7%
Negative33.3%

Bugs and requests

Converter AM

Reported bugs

2 issues
  • App freezes on ads and cannot be closed
  • Ads returned after purchasing ad-free version

Requested features

2 requests
  • Remember previously used units
  • Support for kilos to stones and pounds conversion

PDF Vault

Not enough reviews yet to summarise bugs or requests.

In-app purchases

3 purchases

Converter AM

Subscriptions2
  • Monthly7 Days trial$0.991 Month
  • Yearly7 Days trial$4.991 Year
One-time1
  • Premium version without ads$9.99
2 purchases

PDF Vault

Subscriptions2
  • Mox PDF Tool Unlimited Monthly7 Days trial$4.991 Month
  • Mox PDF Tool Unlimited Annually7 Days trial$19.991 Year

Questions

Is Converter AM free?
Converter AM is free to download, with in-app purchases available.
Is PDF Vault free?
PDF Vault is free to download, with in-app purchases available.
Do Converter AM or PDF Vault have ads?
Neither Converter AM nor PDF Vault shows ads.
Which is updated more often, Converter AM or PDF Vault?
Converter AM ships an update every 2 weeks, and PDF Vault fortnightly. Most recently, Converter AM was updated on October 15, 2026 and PDF Vault on October 12, 2026.

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