Comparison

e vs Cortex

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

Head to head
About

e

Features
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The first complete electronic cash register in Greece. With an app you issue legal retail receipts: • No equipment other than your tablet or mobile phone • Ideal for services, retail, mini markets, food stores • Works even without internet or in places with limited connection • Simple and fast in its operation • Supports barcode scanners for quick issuance of receipts • Automatic sending to the accountant excel with the receipts of the month • With MyData through a provider • Printing on A4, A5 paper or on a thermal printer • Automatically send email to customer (optional), it is not printing of the receipt is necessary By using the application you can make use of tax incentives of Law 4172/2013 such as: • 100% increase in all costs (equipment, provider etc) for MyData • 3-year statute of limitations for tax years • Reduction of tax refund time from ninety (90) to forty five (45) days Primer Software is a licensed electronic invoicing provider from AADE

About

Cortex

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Cortex is a cloud based platform developed to monitor and control KIOUR products. Cortex can log temperature and humidity, digital inputs, relay and alarm activity. One or more enabled users can access remotely the unit to configure its parameters, view data in reports or in graphs and download records in XLS, CSV and PDF format. Events in progress are monitored 24/7 and notifications are send via email and to the users’ mobiles to inform about alarm, power or network failures.

Screenshots

e3 screens
Cortex4 screens

Verdict

The call

The clearest difference is iOS requirement: Cortex at 13.0 against e's 15.6. 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. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

e ships an update every 2 weeks, Cortex monthly. The most recent releases landed on September 7, 2026 and September 19, 2026 respectively.

Scorecard1 real difference · 5 level
e versus Cortex: the parameters behind the verdict, then further details
ParametereCortex
PriceFreeFree
Update frequencyEvery 2 weeks — betterMonthly
AdsNoNo
In-app purchasesNoNo
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.613.0 — better
Further details — not scored
Size33 MB40 MB
Age rating4+4+
DeveloperPRIMER SOFTWARE P.C.KIOUR PC

In-app purchases

None

e

No in-app purchases

None

Cortex

No in-app purchases

Questions

Is e free?
e is free to download, with no in-app purchases.
Is Cortex free?
Cortex is free to download, with no in-app purchases.
Do e or Cortex have ads?
Neither e nor Cortex shows ads.
Which is updated more often, e or Cortex?
e ships an update every 2 weeks, and Cortex monthly. Most recently, e was updated on September 7, 2026 and Cortex on September 19, 2026.

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