# iGPT vs Authenticator App

The clearest difference is in-app purchases: iGPT at none against Authenticator App's 3. iGPT also leads on device support (4 vs 2). On price, update cadence, ads and iOS requirement there is nothing between them.

Both are free to download. Authenticator App sells 3 in-app purchases, starting at $5.99 per 7 days. iGPT asks for nothing beyond the download.

iGPT ships an update every 10 days, Authenticator App fortnightly. The most recent releases landed on September 4, 2026 and September 17, 2026 respectively.

## The numbers

| Metric | iGPT | Authenticator App |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/igpt-ai-email-intelligence/id6741868157/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 10 days** | Fortnightly |
| Monetization | Free | — |
| Size | 15 MB | 17 MB |
| Requires iOS | 15.0 | **14** |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [SpikeNow Ltd.](https://appshunter.io/developer/491044400) | [Forms](https://appshunter.io/developer/1765480567) |

## What reviewers say

### iGPT

[App page](https://appshunter.io/ios/app/igpt-ai-email-intelligence/id6741868157)

This AI-powered tool connects to your email, documents, and other work tools to provide context-rich answers and insights. It helps you make faster, smarter decisions by understanding your work and offering verifiable information with source citations.

**Highlights:** Connects to email, docs, and tools, Provides context-rich answers, Source citations for verifiable truth, Proactive insights on tasks and meetings, Enterprise-grade privacy (SOC2, GDPR compliant), No file uploads or complex prompts needed

**Features:** Vision Pro support

**In-app purchases:** none


### Authenticator App

[App page](https://appshunter.io/ios/app/authenticator-app-secureguard/id6746441080)

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Authenticator Weekly Plan | $5.99 | per 7 days |
| Authenticator Monthly Plan | $19.99 | per month |
| Authenticator Yearly Plan | $39.99 | per year |


## Frequently asked questions

### Is iGPT free?

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

### Is Authenticator App free?

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

### Do iGPT or Authenticator App have ads?

Neither iGPT nor Authenticator App shows ads.

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

iGPT ships an update every 10 days, and Authenticator App fortnightly. Most recently, iGPT was updated on September 4, 2026 and Authenticator App on September 17, 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.*