Comparison

Yubico Authenticator vs Plenig

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

Head to head
About

Yubico Authenticator

Secure your online accounts with hardware-backed two-factor authentication. Store unique credentials on a physical security key, eliminating the need to store sensitive data on your mobile device. Generate verification codes without an internet connection for enhanced account protection.

Highlights
  • Hardware-backed security key storage
  • Touch or NFC authentication
  • USB-C support
  • Biometric unlock (FaceID/TouchID)
  • QR code setup
  • User presence verification
  • Smart Card support
Read full description

Store your unique credentials on a hardware-backed security key and take it wherever you go from mobile to desktop. No more storing sensitive secrets on your mobile phone, leaving your account vulnerable to takeovers. With the Yubico Authenticator you can raise the bar for security. * The Yubico Authenticator will work with any USB, Lightning, or NFC-enabled YubiKeys. * As iPads do not have NFC, they will only work through a Lightning or USB connection. The Yubico Authenticator generates a code used to verify your identity as you are logging into various services. No connectivity needed! Features include: Touch or NFC Authentication - Touch the YubiKey sensor or simply tap a YubiKey with NFC to a mobile phone that is NFC-enabled to store your credential on the YubiKey USB-C support - Connect the YubiKey 5Ci or any USB-C type YubiKey. When prompted, depending on the key, touch the contacts on the sides of the key or the golden ring on the top Biometric support - Experience greater convenience by unlocking your YubiKey with FaceID or TouchID Easy Setup - QR codes available from the services you wish to protect with strong authentication User Presence - New codes generated with just a touch or NFC tap of the YubiKey Compatible - Secure all the services currently compatible with other Authenticator apps Secure - Hardware-backed strong two-factor authentication with secret stored on the YubiKey, not on the mobile device Versatile - Support for multiple work and personal accounts Portable - Get the same set of codes across our other Yubico Authenticator apps for desktops as well as for all leading mobile platforms Flexible - Support for time-based and counter-based code generation Smart Card - Support for Apple's CryptoTokenKit Extension making it possible to use certificates stored on your YubiKey to authenticate with other apps and sites Experience security the modern way with the Yubico Authenticator. Visit yubico.com to learn more.

About

Plenig

Features
Read full description

Plenig is the ultimate professional tool for efficient data collection and field reporting. Designed for teams and individuals who need to digitize their workflow, Plenig allows you to create, fill out, and manage complex forms directly from your mobile device. Generate professional PDF reports instantly. Streamline your operations and eliminate paperwork with Plenig's intuitive interface. Plenig Pro: $4.99/month with a 14-day free trial. Payment is charged to your Apple ID account. Subscription automatically renews unless canceled at least 24 hours before the end of the current period. Manage subscriptions in Settings > Apple ID > Subscriptions. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://plenig.kreadoslab.com/#privacy

Screenshots

Yubico Authenticator4 screens
Plenig4 screens

Verdict

The call

The clearest difference is in-app purchases: Yubico Authenticator at none against Plenig's 2. Plenig's advantage is update cadence (every 10 days vs monthly). On price, ads, device support and iOS requirement 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. Plenig sells 2 in-app purchases, starting at $4.99 per month. Yubico Authenticator asks for nothing beyond the download.

UpkeepUpdate frequency

Yubico Authenticator ships an update monthly, Plenig every 10 days. The most recent releases landed on October 29, 2026 and October 24, 2026 respectively.

Scorecard2 real differences · 8 level
Yubico Authenticator versus Plenig: the parameters behind the verdict, then further details
ParameterYubico AuthenticatorPlenig
PriceFreeFree
Rating3.7 (287 ratings) — better—
Positive reviews42.5% of reviews—
Number of ratings287 — better—
Update frequencyMonthlyEvery 10 days — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree—
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS16.015.0 — better
Further details — not scored
Size4 MB61 MB
Age rating4+4+
DeveloperYubicoKreados Lab LLC

Bugs and requests

Yubico Authenticator

Reported bugs

4 issues
  • NFC not working reliably
  • Accounts disappearing after updates
  • Calculation of codes not working
  • Keyboard issues when using keys

Requested features

5 requests
  • Allow editing and rearranging of entries
  • Add support for multiple keys per account
  • Improve iPad/tablet support
  • Add dark mode option
  • Improve QR code scanning

Plenig

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

Yubico Authenticator

No in-app purchases

2 purchases

Plenig

Subscriptions2
  • Plenig14 Days trial$4.991 Month
  • Plenig$49.991 Year

Questions

Is Yubico Authenticator free?
Yubico Authenticator is free to download, with no in-app purchases.
Is Plenig free?
Plenig is free to download, with in-app purchases available.
Do Yubico Authenticator or Plenig have ads?
Neither Yubico Authenticator nor Plenig shows ads.
Which is updated more often, Yubico Authenticator or Plenig?
Yubico Authenticator ships an update monthly, and Plenig every 10 days. Most recently, Yubico Authenticator was updated on October 29, 2026 and Plenig on October 24, 2026.

Other comparisons