Comparison

flateXSecure vs Kirchenmaus

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

Head to head
About

flateXSecure

Securely authorize transactions without an iTAN card. Receive TANs directly on your smartphone or tablet via the app. Get important notifications through push messages.

Highlights
  • Secure transaction authorization
  • iTAN card alternative
  • Receive TANs on smartphone/tablet
  • Push notifications
  • Choose authorization method
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Mit flateXSecure geben Sie Ihre Transaktionen sicher und komfortabel ohne iTANCard frei. Ihre TAN erhalten Sie mit der App direkt auf Ihr Smartphone oder Tablet. Wichtige Benachrichtigungen werden Ihnen per Push-Funktion angezeigt. Aktivieren Sie flateXSecure zusätzlich zu Ihrer iTANCard und entscheiden Sie in Zukunft selbst, welches Verfahren Sie nutzen möchten.

About

Kirchenmaus

Features
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How much of every euro you earn belongs to the tax office and social insurance – and how much should you put into savings this month, because tax and SVS only arrive later? Kirchenmaus answers that for everyone who is self-employed in Austria. As poor as a church mouse – that is where you end up when you lose sight of taxes and contributions. Whether you are a musician, trainer, craftsperson, doctor or farmer: Kirchenmaus calculates under Austrian rules, explains every term in your words, keeps everything on your device and needs no sign-up and has no ads. HOW YOU START • From “Taxes – what are they?” to “I'm a pro”: the app explains as much as you need • A hands-on tutorial with an example from your own line of work – violinist, trainer, IT provider, doctor or farmer • The key assistant: one simple question after another • At the end you see how much of €100 income goes to the tax office and social insurance, and what stays with you NEWLY SELF-EMPLOYED? “GETTING STARTED” • Step by step: FinanzOnline, registering with the tax office and with SVS, KSVF for artists – already registered? One switch is enough • This year's limits with your own figure next to them: insurance threshold, income tax, small business threshold • What the tax return looks like: E 1, E 1a and deadlines MADE FOR YOUR PROFESSION • SVS under GSVG, FSVG or BSVG, chamber professions, freelance service contract • Flat rates: artists, basic, small business, sales agents, agriculture • Categories and words from your profession: fee note or invoice, concert trip or business trip • Farm shop for farmers: daily takings, processed products, cash register and SVS report EVERY MONTH: WHAT GOES INTO SAVINGS • For each income: how much is taxes and contributions, and what stays yours • For each month: the income tax and SVS that will only be charged later – as a recommendation for your savings account • Does it work out? One big figure with a bar: spending, tax and SVS, what stays free • You decide what the month shows: show, hide and move blocks ENTER WHAT YOU KNOW • Income and fixed costs, private and business; dates in the calendar to tap • Kirchenmaus books fixed costs itself on the due date; your own categories, most used on top • Cash book and trip assistant with travel costs and daily allowances • Fee notes and receipts from email, scan or file – Kirchenmaus reads amount, date and number itself • See overdue invoices and note reminders; the year's receipts as a ZIP for your tax adviser TAX UNDER AUSTRIAN RULES • Income tax, profit allowance, employment from your payslip, Family Bonus Plus, partnerships (E 11) • Prescribed payments from SVS and the tax office in view – no back payment that surprises you • VAT per month or quarter, with the figures to copy into FinanzOnline • Tax time step by step: checklist, E 1a schedule, transaction journal IMPORT BANK STATEMENTS • George (JSON), camt.053, MT940, CSV and Excel from any Austrian bank • The whole tax year at once or every month – Kirchenmaus recognises duplicates IPHONE AND IPAD – YOUR DATA STAYS WITH YOU • German or English – choose in the app; on iPad list and document side by side • No sign-up, no bank connection, no server; sync via iCloud only if you want it • Apple Intelligence suggests categories – on device FREE – OR PLUS, ONCE The assistant, “Getting started”, fee notes, receipts, monthly tax and SVS, bank statements and day-to-day bookkeeping are free – without ads. Kirchenmaus Plus is a one-time purchase, no subscription: funding across Austria with deadlines, Excel for your tax adviser, year comparison, year-end check, AI workshop, loan, cash books for clubs, further entities, dictation and widgets. Most Plus features can be tried once for free. Kirchenmaus calculates approximations under the Austrian rates in force. Assessments and payment notices are binding; for your situation your tax adviser decides. Kirchenmaus transmits nothing to FinanzOnline.

Screenshots

flateXSecure4 screens
Kirchenmaus4 screens

Verdict

The call

The clearest difference is in-app purchases: flateXSecure at none against Kirchenmaus's 1. flateXSecure also leads on iOS requirement (12.0 vs 26.0). Kirchenmaus's advantage is update cadence (every 2 weeks vs every 5 months). On price, ads 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. Kirchenmaus sells 1 one-off in-app purchase. flateXSecure asks for nothing beyond the download.

UpkeepUpdate frequency

flateXSecure ships an update every 5 months, Kirchenmaus every 2 weeks. The most recent releases landed on November 11, 2026 and November 10, 2026 respectively.

Scorecard3 real differences · 7 level
flateXSecure versus Kirchenmaus: the parameters behind the verdict, then further details
ParameterflateXSecureKirchenmaus
PriceFreeFree
Rating4.5 (85 ratings) — better—
Positive reviews84.9% of reviews—
Number of ratings85 — better—
Update frequencyEvery 5 monthsEvery 2 weeks — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree—
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS12.0 — better26.0
Further details — not scored
Size10 MB40 MB
Age rating4+12+
DeveloperflatexDEGIRO SEDaniil Auner

In-app purchases

None

flateXSecure

No in-app purchases

1 purchases

Kirchenmaus

One-time1
  • Kirchenmaus Plus$4.99

Questions

Is flateXSecure free?
flateXSecure is free to download, with no in-app purchases.
Is Kirchenmaus free?
Kirchenmaus is free to download, with in-app purchases available.
Do flateXSecure or Kirchenmaus have ads?
Neither flateXSecure nor Kirchenmaus shows ads.
Which is updated more often, flateXSecure or Kirchenmaus?
flateXSecure ships an update every 5 months, and Kirchenmaus every 2 weeks. Most recently, flateXSecure was updated on November 11, 2026 and Kirchenmaus on November 10, 2026.

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