# Centrios vs Saccade

The clearest difference is rating: Saccade at 5.0 against Centrios's 4.5. Saccade also leads on update cadence (every 2 days vs every 6 weeks) and monetization model (free vs ad-supported). Centrios's advantage is ratings volume (17 vs 1) and iOS requirement (16.0 vs 26.0). 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.

Saccade holds the better App Store score, 5.0 against 4.5. That said, the two scores are not equally well evidenced: Centrios has 17 ratings behind it against 1, so its average is the more settled of the two.

Centrios ships an update every 6 weeks, Saccade every 2 days. The most recent releases landed on November 7, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Centrios | Saccade |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.5 (17 ratings)](https://appshunter.io/ios/app/centrios/id6449100322/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/saccade-ab-test-by-eye/id6760804458/reviews)** |
| Number of ratings | **17** | 1 |
| Positive reviews | 90.5% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Every 2 days** |
| Monetization | Ad-supported | **Free** |
| Size | 371 MB | 4 MB |
| Requires iOS | **16.0** | 26.0 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [ASSA ABLOY Canada Ltd.](https://appshunter.io/developer/1687705830) | [Axiomic, LLC](https://appshunter.io/developer/1868106492) |

## What reviewers say

### Centrios

[App page](https://appshunter.io/ios/app/centrios/id6449100322)

Manage business access remotely with a smart lock system. Control locks, grant temporary access to staff and visitors, and monitor activity logs. Ideal for businesses needing secure and flexible entry management.

**Highlights:** Unlock and lock doors remotely, Grant access to staff and visitors, Create and edit access schedules, View activity and access history, Manage multiple locations

**In-app purchases:** none


### Saccade

[App page](https://appshunter.io/ios/app/saccade-ab-test-by-eye/id6760804458)

This app uses your iPhone's TrueDepth camera to track your gaze and determine unconscious preferences between visual variants. Upload images, look at pairs, and receive instant ranked results based on where your eyes linger.

**Highlights:** Upload multiple image variants, Automatic A/B pair generation, Real-time gaze tracking, Instant ranked preference results, Privacy-focused, no account needed, Built-in Emoji Duel game

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

**In-app purchases:** none


## Frequently asked questions

### Is Centrios free?

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

### Is Saccade free?

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

### Which has better reviews, Centrios or Saccade?

Saccade is rated higher. Centrios averages 4.5 out of 5 from 17 ratings, while Saccade averages 5.0 from 1 ratings.

### Do Centrios or Saccade have ads?

Neither Centrios nor Saccade shows ads.

### Which is updated more often, Centrios or Saccade?

Centrios ships an update every 6 weeks, and Saccade every 2 days. Most recently, Centrios was updated on November 7, 2026 and Saccade on October 31, 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.*