Comparison

Date Converter vs VAT CheckMachine

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

Head to head
About

Date Converter

Easily convert dates between various calendar systems like Gregorian, Islamic, Coptic, and Hebrew. Features authentic month names and a modern, customizable interface for researchers, historians, and religious observers.

Highlights
  • Convert between Gregorian, Islamic, Coptic, Um Al Qura, Hebrew, and Solar Hijri calendars
  • Authentic month names for each calendar system
  • Intuitive, modern Material Design 3 interface
  • Customizable calendar display and order
  • Advanced date selection with direct year editing
  • Seamless synchronization across all displayed calendars
Features
Read full description

Convert dates between multiple calendar systems with ease. Date Converter is a powerful, user-friendly app that allows you to convert dates between multiple calendar systems with just a tap. Perfect for researchers, historians, religious observers, and anyone who needs to work with different calendar systems. FEATURES: • Convert dates between multiple calendar systems: - Gregorian (ISO) - Islamic - Coptic - Um Al Qura - Hebrew - Solar Hijri (Iranian/Persian) • Authentic month names for each calendar system - See the proper month names in each calendar (e.g., Farvardin, Ordibehesht for Solar Hijri) - Accurate representation of each calendar's unique features • Intuitive, modern interface - Clean, Material Design 3 UI - Light, dark, and system theme options - Simple, intuitive controls • Customizable experience - Choose which calendars to display - Reorder calendars to your preference - Personalize your workflow • Advanced date selection - Edit year numbers directly in custom date pickers - "Today" button to quickly reset all calendars - Increment/decrement dates with + and - buttons • Seamless synchronization - All calendars automatically update when any date is changed - See equivalent dates across all calendar systems instantly Whether you're planning religious observances, researching historical dates, or simply curious about different calendar systems, Date Converter provides a simple yet powerful tool for all your date conversion needs. Perfect for: • Historians and researchers • Religious scholars and practitioners • Students of history and culture • International business professionals • Anyone working across different cultural calendars Download Date Converter today and navigate the world's calendar systems with ease!

About

VAT CheckMachine

This free utility app validates EU VAT numbers instantly and calculates VAT amounts for all EU states. It offers on-the-fly correctness testing and keeps a history of checked numbers for easy reference and sharing.

Highlights
  • Instant EU VAT number validation
  • On-the-fly correctness testing
  • VAT and Net/Gross amount calculation
  • Supports all 28 EU states
  • History of checked numbers
  • Sharing of checked numbers
Read full description

The Ultimate VAT check machine! Comprehensive • Powerful • Flexible • Beautiful • Free! • Replaces 2 or more apps, keeps your iPhone tidy • On-the-fly correctness test of VAT numbers of all 28 EU states • Checks European VAT numbers (28 states) with EU authorities (VIES) • Calculates VAT and Net/Gross amounts for all rates of all 28 EU states • Keeps checked numbers history for reference and sharing What is it? CheckMachine is a free (ad-supported) iPhone app that encompasses a wealth of VAT-related functions within a single app: Instantly* validates all EU VAT numbers, so that you can safely issue zero-VAT invoices to entities entitled to VAT exoneration according to EU laws. Instantly calculates VAT and Net/Gross amounts for any amount you type, as you type it, and it does this for all VAT rates of all 28 EU states! Checked numbers can be added to History either automatically or manually, for reference and sharing with other apps or people. Auto-add is enabled through the app's Settings page. * Depending on availability of the VIES web service. Whom is it for? This app is a valuable free resource for business and pleasure. It serves those in the European Union involved with invoicing intra-EU transactions, and those in need of a handy and speedy VAT calculator that works in all EU states. How does it work? As the user types a VAT number of any EU state, the app examines its correctness ("well-formedness") on-the-fly using the actual algorithms of each EU state, not just the number and type of digits! This step ensures usability and keeps traffic and fees low. EU VAT numbers (from any of the 28 EU states) are checked using the official web service maintained by the European Commission's VAT Information Exchange System (VIES). Attention: Not all correct VAT numbers are valid, therefore you must always check the validity of all VAT numbers before actually using them in invoices.

Screenshots

Date Converter4 screens
VAT CheckMachine4 screens

Verdict

The call

The clearest difference is review sentiment: Date Converter at 50% against VAT CheckMachine's 0%. Date Converter also leads on update cadence (every 3 weeks vs every 2 months). VAT CheckMachine's advantage is in-app purchases (none vs 1) and ads (none vs shown). 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. Date Converter sells 1 one-off in-app purchase. VAT CheckMachine asks for nothing beyond the download.

UpkeepUpdate frequency

Date Converter ships an update every 3 weeks, VAT CheckMachine every 2 months. The most recent releases landed on October 29, 2026 and October 23, 2026 respectively.

Scorecard6 real differences · 4 level
Date Converter versus VAT CheckMachine: the parameters behind the verdict, then further details
ParameterDate ConverterVAT CheckMachine
PriceFreeFree
Rating4.4 (110 ratings) — better—
Positive reviews50.0% of reviews — better0.0% of reviews
Number of ratings110 — better—
Update frequencyEvery 3 weeks — betterEvery 2 months
AdsYesNo — better
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS13.09.0 — better
Further details — not scored
Size33 MB11 MB
Age rating4+4+
DeveloperTenTalEscape Tech Ltd

Customer experience

Date Converter

All ratings110 ratings
Positive85.5%
Neutral1.8%
Negative12.7%
Written reviews26 reviews
Positive50.0%
Neutral15.4%
Negative34.6%

VAT CheckMachine

Written reviews1 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

In-app purchases

1 purchases

Date Converter

One-time1
  • REMOVE ADS OPTION$1.99
None

VAT CheckMachine

No in-app purchases

Questions

Is Date Converter free?
Date Converter is free to download, with in-app purchases available.
Is VAT CheckMachine free?
VAT CheckMachine is free to download, with no in-app purchases.
Do Date Converter or VAT CheckMachine have ads?
Date Converter shows ads; VAT CheckMachine does not.
Which is updated more often, Date Converter or VAT CheckMachine?
Date Converter ships an update every 3 weeks, and VAT CheckMachine every 2 months. Most recently, Date Converter was updated on October 29, 2026 and VAT CheckMachine on October 23, 2026.

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