# AirLock vs ContextStacker

The clearest difference is in-app purchases: AirLock at none against ContextStacker's 2. AirLock also leads on iOS requirement (15.1 vs 17.0). On price, ads and device support there is nothing between them.

Both are free to download. ContextStacker sells 2 in-app purchases, starting at $99.00 per year. AirLock asks for nothing beyond the download.

## The numbers

| Metric | AirLock | ContextStacker |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/airlock-offline-and-secure-ai/id6757252354/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | — | Every 3 days |
| Monetization | Free | — |
| Size | 55 MB | 7 MB |
| Requires iOS | **15.1** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [ARJUN MANISH SHETH BABLA](https://appshunter.io/developer/1865577569) | [鹏源 邱](https://appshunter.io/developer/1042192961) |

## What reviewers say

### AirLock

[App page](https://appshunter.io/ios/app/airlock-offline-and-secure-ai/id6757252354)

This AI assistant operates entirely on your device, ensuring your conversations remain private and secure. Enjoy powerful AI capabilities offline, without sending any data to the cloud. It's fast, responsive, and requires no internet connection after initial setup.

**Highlights:** 100% Offline operation, Private and secure conversations, Zero data tracking, Fast and responsive AI, On-device local LLM

**Features:** macOS Compatibility

**In-app purchases:** none


### ContextStacker

[App page](https://appshunter.io/ios/app/contextstacker/id6774051551)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Annual | $99.00 | per year |
| Business Annual | $199.00 | per year |


## Frequently asked questions

### Is AirLock free?

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

### Is ContextStacker free?

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

### Do AirLock or ContextStacker have ads?

Neither AirLock nor ContextStacker shows ads.

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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.*