# Yubico Authenticator vs Plenig

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.

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.

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

## The numbers

| Metric | Yubico Authenticator | Plenig |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.7 (287 ratings)](https://appshunter.io/ios/app/yubico-authenticator/id1476679808/reviews)** | — |
| Number of ratings | **287** | — |
| Positive reviews | 42.5% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Monthly | **Every 10 days** |
| Monetization | Free | — |
| Size | 4 MB | 61 MB |
| Requires iOS | 16.0 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Yubico](https://appshunter.io/developer/586890748) | [Kreados Lab LLC](https://appshunter.io/developer/1892911801) |

## What reviewers say

### Yubico Authenticator

[App page](https://appshunter.io/ios/app/yubico-authenticator/id1476679808)

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

**In-app purchases:** none

**What reviewers like**

- 🚀 Works well with Yubikey
- 🔒 Secure storage of OATH secrets
- 👍 Simple and easy to use
- 🚀 NFC support added

**What reviewers complain about**

- 🐛 NFC not working on some devices
- 🐛 Clunky UI for password-protected keys
- 🐛 Crashes and freezes reported
- 🐛 Incompatible with some devices (iPad, older iPhones)

**Reported bugs**

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

**Requested features**

- 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

[App page](https://appshunter.io/ios/app/plenig/id6762101118)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Plenig | $4.99 | per month |
| Plenig | $49.99 | per year |


## Frequently asked 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.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*