# Yubico Authenticator vs Spacemail

The clearest difference is rating: Spacemail at 4.7 against Yubico Authenticator's 3.7. Spacemail also leads on update cadence (every 5 days vs monthly) and review sentiment (53% vs 44%). Yubico Authenticator's advantage is iOS requirement (16.0 vs 18.0). On price, ratings volume, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Spacemail holds the better App Store score, 4.7 against 3.7. Both are backed by a comparable volume of ratings — 268 and 237 respectively. Written reviews point the same way: 44% of Yubico Authenticator's written reviews are positive against 53% of Spacemail's.

Yubico Authenticator ships an update monthly, Spacemail every 5 days. The most recent releases landed on September 14, 2026 and September 22, 2026 respectively.

## The numbers

| Metric | Yubico Authenticator | Spacemail |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.7 (268 ratings)](https://appshunter.io/ios/app/yubico-authenticator/id1476679808/reviews) | **[4.7 (237 ratings)](https://appshunter.io/ios/app/spacemail/id6754387443/reviews)** |
| Number of ratings | **268** | 237 |
| Positive reviews | 43.6% of reviews | **53.3% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Monthly | **Every 5 days** |
| Monetization | Free | Free |
| Size | 4 MB | 160 MB |
| Requires iOS | **16.0** | 18.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 17+ |
| Developer | [Yubico](https://appshunter.io/developer/586890748) | [Namecheap, Inc](https://appshunter.io/developer/482604035) |

## 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


### Spacemail

[App page](https://appshunter.io/ios/app/spacemail/id6754387443)

Manage your business email efficiently with this app. It offers a fast, intuitive interface with instant syncing across devices. Enjoy smart security features like 2FA and data encryption in an ad-free environment.

**Highlights:** Seamless business email management, Smart security with 2FA and encryption, Intuitive design and instant sync, Intelligent dark mode, Ad-free inbox

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Yubico Authenticator free?

Yubico Authenticator is free to download, with no in-app purchases.

### Is Spacemail free?

Spacemail is free to download, with no in-app purchases.

### Which has better reviews, Yubico Authenticator or Spacemail?

Spacemail is rated higher. Yubico Authenticator averages 3.7 out of 5 from 268 ratings, while Spacemail averages 4.7 from 237 ratings.

### Do Yubico Authenticator or Spacemail have ads?

Neither Yubico Authenticator nor Spacemail shows ads.

### Which is updated more often, Yubico Authenticator or Spacemail?

Yubico Authenticator ships an update monthly, and Spacemail every 5 days. Most recently, Yubico Authenticator was updated on September 14, 2026 and Spacemail on September 22, 2026.

---

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