# Authenticator App vs InstaLM

The clearest difference is update cadence: InstaLM at every 4 days against Authenticator App's monthly. Authenticator App's advantage is iOS requirement (13.0 vs 17.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Authenticator App sells 1 in-app purchase, starting at $2.00 per month and InstaLM sells 3 in-app purchases, starting at $4.99 per 7 days. Whichever you choose, the download price is not the number that matters.

Authenticator App ships an update monthly, InstaLM every 4 days. The most recent releases landed on June 11, 2026 and September 23, 2026 respectively.

## The numbers

| Metric | Authenticator App | InstaLM |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/authenticator-app-2fa-pro/id6448697938/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Monthly | **Every 4 days** |
| Monetization | Free with in-app purchases | — |
| Size | 59 MB | 29 MB |
| Requires iOS | **13.0** | 17.0 |
| Devices | iPhone, iPod | **iPhone, iPad, Mac** |
| Age rating | 17+ | 4+ |
| Developer | [Denis Vithani](https://appshunter.io/developer/1611512969) | [旻 蔡](https://appshunter.io/developer/1454667188) |

## What reviewers say

### Authenticator App

[App page](https://appshunter.io/ios/app/authenticator-app-2fa-pro/id6448697938)

This app provides two-factor authentication by generating time-based one-time passwords (TOTP) and push authentication. It adds an extra layer of security to your online accounts by creating unique codes that help protect against unauthorized access.

**Highlights:** Two-factor authentication, TOTP & HOTP token generation, 30 & 60 second tokens, QR code scanner, Password protection for tokens, No internet connection required for codes

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Authenticator Subscription | $2.00 | per month |


### InstaLM

[App page](https://appshunter.io/ios/app/instalm/id6504527345)

**Features:** Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| InstaLM Plus (Weekly) | $4.99 | per 7 days |
| InstaLM Plus (Monthly) | $19.99 | per month |
| InstaLM Plus (Annual) | $199.99 | per year |


## Frequently asked questions

### Is Authenticator App free?

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

### Is InstaLM free?

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

### Do Authenticator App or InstaLM have ads?

Neither Authenticator App nor InstaLM shows ads.

### Which is updated more often, Authenticator App or InstaLM?

Authenticator App ships an update monthly, and InstaLM every 4 days. Most recently, Authenticator App was updated on June 11, 2026 and InstaLM on September 23, 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.*