# Cortis vs ContextStacker

The clearest difference is update cadence: ContextStacker at every 3 days against Cortis's weekly. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Cortis sells 6 in-app purchases, starting at $2.99 per month and ContextStacker sells 2 in-app purchases, starting at $99.00 per year. Whichever you choose, the download price is not the number that matters.

Cortis ships an update weekly, ContextStacker every 3 days. The most recent releases landed on October 24, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Cortis | ContextStacker |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[1.0 (1 ratings)](https://appshunter.io/ios/app/cortis-on-device-ai-chat/id6760265080/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Weekly | **Every 3 days** |
| Monetization | Free with in-app purchases | — |
| Size | 79 MB | 7 MB |
| Requires iOS | **16.0** | 17.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 12+ | 4+ |
| Developer | [Batuhan Ayhan](https://appshunter.io/developer/1880809979) | [鹏源 邱](https://appshunter.io/developer/1042192961) |

## What reviewers say

### Cortis

[App page](https://appshunter.io/ios/app/cortis-on-device-ai-chat/id6760265080)

This app provides an on-device AI chatbot that functions entirely offline, requiring no internet connection or account. It integrates with Siri and Shortcuts for hands-free use and automations, and can analyze images locally. The free version offers extensive features, with an optional Pro upgrade for more models and advanced capabilities.

**Highlights:** On-device AI processing, Offline functionality, Siri integration, Shortcuts automation, Image analysis, Multiple AI models, No ads or tracking

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

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Cortis Pro Monthly | $2.99 | per month |
| Cortis Pro Weekly | $4.99 | per 7 days |
| Cortis Pro Annual | $9.99 | per year |
| Cortis Pro Annual | $29.99 | per year |
| Cortis Pro | $14.99 | one-time |
| Cortis Pro Lifetime | $49.99 | one-time |


### 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 Cortis free?

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

### Is ContextStacker free?

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

### Do Cortis or ContextStacker have ads?

Neither Cortis nor ContextStacker shows ads.

### Which is updated more often, Cortis or ContextStacker?

Cortis ships an update weekly, and ContextStacker every 3 days. Most recently, Cortis was updated on October 24, 2026 and ContextStacker on October 25, 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.*