# Active Theory Experiments vs Argus

The clearest difference is update cadence: Active Theory Experiments at every 3 days against Argus's every 2 months. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Active Theory Experiments ships an update every 3 days, Argus every 2 months. The most recent releases landed on October 25, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Active Theory Experiments | Argus |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/argus-ai-search/id6760634171/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 days** | Every 2 months |
| Monetization | — | Free |
| Size | 1 MB | 13 MB |
| Requires iOS | **16.4** | 17.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 9+ | 4+ |
| Developer | [Active Theory](https://appshunter.io/developer/956025432) | [Liqun Chen](https://appshunter.io/developer/1880102480) |

## What reviewers say

### Active Theory Experiments

[App page](https://appshunter.io/ios/app/active-theory-experiments/id6476633034)

**In-app purchases:** none


### Argus

[App page](https://appshunter.io/ios/app/argus-ai-search/id6760634171)

This app acts as a personal knowledge search engine, indexing your iPhone data like photos, messages, and health metrics. It allows you to search, ask questions, and take action on your information using AI, with privacy-first, on-device processing.

**Highlights:** On-device AI processing, Hybrid keyword and semantic search, Natural language queries, AI Photo Studio for image editing, Health data dashboard, Personalized insights and memory features, Customizable power user tools

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

**In-app purchases:** none


## Frequently asked questions

### Is Active Theory Experiments free?

Active Theory Experiments is free to download, with no in-app purchases.

### Is Argus free?

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

### Do Active Theory Experiments or Argus have ads?

Neither Active Theory Experiments nor Argus shows ads.

### Which is updated more often, Active Theory Experiments or Argus?

Active Theory Experiments ships an update every 3 days, and Argus every 2 months. Most recently, Active Theory Experiments was updated on October 25, 2026 and Argus on October 24, 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.*