Comparison

Notakey Authenticator vs Mega Converter

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

Head to head
About

Notakey Authenticator

Features
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Typical uses cases include: - VPN & workstation login protection; - mobile and web transaction approval for finance companies; - legal document signing; - passwordless web login. Compared to other solutions Notakey Authenticator is: - Lighting fast - uses push notifications and there is no need for manual code retyping; - Extremely secure - instead of shared secrets uses Public Key cryptography, where private key is generated and protected by phone's hardware; - Private & legally binding - user identification information is distributed on the phones. Previously only this has been available on eID card. Check out https://demobank.notakey.com/registration for possible use cases.

About

Mega Converter

Features
Read full description

Every converter a professional reaches for, in one app. 36 categories, 198 units and 15 specialist tools that ordinary converter apps skip. Built for people who convert for a living: trades, engineers, designers, video editors, developers and cooks. And there is not a single ad in it. WHAT YOU CAN CONVERT • Convert length, weight, temperature, volume, area, speed and time • Work in pressure, torque, power, force, energy, density, flow and fuel economy • Check live exchange rates for 30 currencies, cached so they keep working offline • Match wire sizes with AWG to millimetre tables built for the job site • Run SMPTE timecode at every frame rate, drop frame handled correctly • Turn cups into grams for 25 real ingredients, with oven temperatures included • Compare time zones city by city and paste the result into a meeting invite • Convert colours across HEX, RGB, HSL and CMYK with contrast checks • Switch between binary, octal, decimal and hex with a 32 bit view • Calculate percentages, tips, discounts, date gaps and download times • Convert Roman numerals, paper sizes, Unix timestamps and more MADE FOR ACCURACY Conversion factors follow SI and NIST definitions, exact where an exact definition exists. Numbers stay monospaced while you type, results show sensible precision, and every tool works with no signal. SHARE THE ANSWER Every tool shares a clean text summary, so the person on the other end gets the conversion, the working and the source in one message. MEGACONVERT PRO One subscription unlocks every category and tool, billed monthly or yearly. Cancel any time in your Apple Account settings. The whole catalogue is free to browse before you decide. Terms of Use: https://www.termsfeed.com/live/aa943f0d-36cc-44f6-b89b-38d9e38c63f6 Privacy Policy: https://www.termsfeed.com/live/663d6495-624f-4e2f-974b-ec3ee69ad45a Download MegaConverter and stop searching the web for numbers you need in seconds. Terms: https://www.termsfeed.com/live/aa943f0d-36cc-44f6-b89b-38d9e38c63f6 Privacy Policy: https://www.termsfeed.com/live/663d6495-624f-4e2f-974b-ec3ee69ad45a

Screenshots

Notakey Authenticator4 screens
Mega Converter4 screens

Verdict

The call

The clearest difference is update cadence: Notakey Authenticator at every 6 weeks against Mega Converter's every 9 months. Notakey Authenticator also leads on device support (3 vs 1) and iOS requirement (15.0 vs 18.1). On price, 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

Notakey Authenticator ships an update every 6 weeks, Mega Converter every 9 months. The most recent releases landed on October 9, 2026 and October 7, 2026 respectively.

Scorecard3 real differences · 3 level
Notakey Authenticator versus Mega Converter: the parameters behind the verdict, then further details
ParameterNotakey AuthenticatorMega Converter
PriceFreeFree
Update frequencyEvery 6 weeks — betterEvery 9 months
AdsNoNo
In-app purchasesNoNo
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS15.0 — better18.1
Further details — not scored
Size89 MB14 MB
Age rating4+4+
DeveloperNotakey LatviaPedro Gregorio

In-app purchases

None

Notakey Authenticator

No in-app purchases

None

Mega Converter

No in-app purchases

Questions

Is Notakey Authenticator free?
Notakey Authenticator is free to download, with no in-app purchases.
Is Mega Converter free?
Mega Converter is free to download, with no in-app purchases.
Do Notakey Authenticator or Mega Converter have ads?
Neither Notakey Authenticator nor Mega Converter shows ads.
Which is updated more often, Notakey Authenticator or Mega Converter?
Notakey Authenticator ships an update every 6 weeks, and Mega Converter every 9 months. Most recently, Notakey Authenticator was updated on October 9, 2026 and Mega Converter on October 7, 2026.

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