# Underlayer vs Authenticator App₊

The clearest difference is update cadence: Authenticator App₊ at every 5 weeks against Underlayer's every 5 months. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Underlayer sells 1 in-app purchase, starting at $2.99 per 7 days and Authenticator App₊ sells 2 in-app purchases, starting at $5.99 per 7 days. Whichever you choose, the download price is not the number that matters.

Underlayer ships an update every 5 months, Authenticator App₊ every 5 weeks. The most recent releases landed on September 12, 2026 and September 18, 2026 respectively.

## The numbers

| Metric | Underlayer | Authenticator App₊ |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/authenticator-app/id6755099282/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | Yes | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 5 months | **Every 5 weeks** |
| Monetization | — | Free with in-app purchases |
| Size | 169 MB | 73 MB |
| Requires iOS | 15.1 | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Mihail Rukavishnikov](https://appshunter.io/developer/1648782212) | [VUNYO BILGI TEKNOLOJILERI LIMITED SIRKETI](https://appshunter.io/developer/1768332147) |

## What reviewers say

### Underlayer

[App page](https://appshunter.io/ios/app/underlayer/id6753363956)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium | $2.99 | per 7 days |


### Authenticator App₊

[App page](https://appshunter.io/ios/app/authenticator-app/id6755099282)

This app generates secure, time-based one-time passwords (TOTP) for two-factor authentication (2FA) and multi-factor authentication (MFA). It supports QR code scanning and manual setup, works offline, and offers encrypted backups and iCloud sync across Apple devices.

**Highlights:** Secure 2FA & MFA code generation, QR code scanner and manual setup, Offline authentication codes, Encrypted backup and restore, iCloud sync across Apple devices, Face ID, Touch ID, or PIN lock

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Premium | $5.99 | per 7 days |
| Yearly Premium | $49.99 | per year |


## Frequently asked questions

### Is Underlayer free?

Underlayer is free to download, with in-app purchases available.

### Is Authenticator App₊ free?

Authenticator App₊ is free to download, with in-app purchases available.

### Do Underlayer or Authenticator App₊ have ads?

Both Underlayer and Authenticator App₊ show ads.

### Which is updated more often, Underlayer or Authenticator App₊?

Underlayer ships an update every 5 months, and Authenticator App₊ every 5 weeks. Most recently, Underlayer was updated on September 12, 2026 and Authenticator App₊ on September 18, 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.*