VAT CheckMachine vs myΔΕΗ
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- 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
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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.
myΔΕΗ
Manage your energy account, activate services, and receive personalized energy-saving tips. Earn rewards and miles through a loyalty program with exclusive offers and discounts from partner brands.
- Account management
- Product and service activation
- Personalized energy-saving tips
- Meter reading submission
- Loyalty and rewards program
- Earn and redeem miles
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Enter the digital world of myDEI and enjoy the features of the new PPC application wherever you are! Sign up to myDEI in three simple steps to manage your account easily and quickly, activate products and services, benefit from personalized energy-saving tips from PPC, register your meter readings online, and more. Discover the new PPC myRewards loyalty and rewards program which includes the PPC myRewards Coupons service that rewards you with offers and discounts from top brands and the PPC myRewards Miles service that allows you to earn and redeem miles in collaboration with AEGEAN Miles+Bonus. Account update Manage your energy supply and property information. Handle your bills easily or set up a standing order. • Information on consumption bill and settlements • Consumption history • Frequency selection • Option to receive electronic or paper bill Products & services activation In-app selection of electricity products or activation of add-on services • Find out the benefits and advantages of each product or service • Select the product that best meets your needs • Quickly activate add-on services for additional benefits Energy saving Learn more about your energy consumption and how it is distributed among your household's appliances. Set your own consumption reduction target and use the PPC myEnergy Coach's personalized energy-saving tips to achieve it. • Consumption monitoring and evaluation • Personalized energy-saving recommendations • Distribution of consumption among household and/or commercial appliances • Estimation of energy and cost savings from replacing appliances • Comparison of consumption with similar households and/or businesses Submission of meter readings Take control of your electricity bill by registering your meter readings online using the e-SelfMetering tool and it will be issued based on your consumption up until that moment. Choose whether you want to be notified of the available date for registering readings via SMS and/or e-mail. • Simple meter reading submission PPC myRewards Coupons Discover exclusive discount coupons and offers from top brands. • Unique offers for all your needs • Discounts and deals on shopping, getaways, food and coffee, and much more • Coupons available via SMS, e-mail, or PDF format PPC myRewards Miles Earn miles by activating PPC products and services and pay your PPC bills by redeeming miles, in collaboration with AEGEAN Miles+Bonus. PPC Fiber Enjoy the best fiber optic experience at home, with fast and stable internet for all your digital needs. Manage your PPC Fiber connections and pay your bills
Screenshots
Verdict
The clearest difference is ads: VAT CheckMachine at none against myΔΕΗ's shown. VAT CheckMachine also leads on monetization model (free vs free with in-app purchases) and iOS requirement (9.0 vs 14.0). myΔΕΗ's advantage is review sentiment (20% vs 0%). On price, update cadence, in-app purchases 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
VAT CheckMachine ships an update every 2 months, myΔΕΗ monthly. The most recent releases landed on June 5, 2026 and September 14, 2026 respectively.
| Parameter | VAT CheckMachine | myΔΕΗ |
|---|---|---|
| Price | Free | Free |
| Rating | — | 2.2 (101 ratings) — better |
| Positive reviews | 0.0% of reviews | 19.8% of reviews — better |
| Number of ratings | — | 101 — better |
| Update frequency | Every 2 months | Monthly — better |
| Ads | No — better | Yes |
| In-app purchases | No | No |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPod | iPhone, iPod |
| Requires iOS | 9.0 — better | 14.0 |
| Further details — not scored | ||
| Size | 11 MB | 76 MB |
| Age rating | 4+ | 4+ |
| Developer | Escape Tech Ltd | ΔΕΗ |
Customer experience
VAT CheckMachine
myΔΕΗ
Bugs and requests
VAT CheckMachine
Not enough reviews yet to summarise bugs or requests.
myΔΕΗ
Reported bugs
38 issues- Login not working
- Cannot pull up previous bills
- Cannot find usage information
- Cannot go back on some screens
- Password change issues
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- Payment button does nothing
- Glitchy payment processing
- Unable to locate bill breakdown
- App does not work internationally
- SMS system not working for international numbers
- App crashes or logs out
- Login and registration tabs reversed
- Error message for required fields
- Password not recognized
- Account blocked/doesn't exist
- Telephone number validation fails for foreign numbers
- Country codes do not match
- Does not recognize Australian area code
- Eliminated account not returning
- Cannot find bills or balance
- Bills disappeared after new version
- USA phone number not accepted
- App does not open after update
- Nothing working for months
- Bill payments not updating
- App logs out due to no web connection
- Cannot register account
- VAT or ID numbers incorrect
- Website link to update info not working
- Cannot pay directly with NBG debit card
- Cannot pay over 200€
- NBG card not accepted
- Nothing is working
- Meter reading entry opens alphabetical keyboard
- Cannot input numbers in field
- Credit card details fields too small
- App not working at all
- Cannot pass meter readings
Requested features
7 requests- Face recognition/biometric login
- Dark mode
- Save card details for payment
- Apple Pay option
- Direct debit setup
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- PDF bill presentation
- Automatic balance update after payment
In-app purchases
VAT CheckMachine
No in-app purchases
myΔΕΗ
No in-app purchases









