# Parallax vs Celestis

The clearest difference is update cadence: Parallax at every 2 days against Celestis's every 2 weeks. Parallax also leads on device support (6 vs 2). Celestis's advantage is ratings volume (4 vs 1). On price, rating, ads and in-app purchases there is nothing between them.

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

On the App Store both sit at effectively the same score — 5.0 for Parallax against 5.0 for Celestis. Both are backed by a comparable volume of ratings — 1 and 4 respectively.

Parallax ships an update every 2 days, Celestis every 2 weeks. The most recent releases landed on October 28, 2026 and October 23, 2026 respectively.

## The numbers

| Metric | Parallax | Celestis |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/parallax-multi-model-ai/id6761632539/reviews) | [5.0 (4 ratings)](https://appshunter.io/ios/app/celestis/id6781116681/reviews) |
| Number of ratings | 1 | **4** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 days** | Every 2 weeks |
| Monetization | Free | Free |
| Size | 7 MB | 3.0 GB |
| Requires iOS | 26.0 | 26.0 |
| Devices | **iPhone, iPad, Mac, Apple TV, Apple Watch, Vision Pro** | iPhone, iPad |
| Age rating | 12+ | 12+ |
| Developer | [Chris Nicolaidis](https://appshunter.io/developer/1252329035) | [Celestis Ai Inc](https://appshunter.io/developer/6781116683) |

## What reviewers say

### Parallax

[App page](https://appshunter.io/ios/app/parallax-multi-model-ai/id6761632539)

This AI companion offers private, on-device assistance or connects to various cloud AI providers. It allows side-by-side response comparison, live web context retrieval, and generates charts directly in conversations. Features include voice input, file analysis, image generation, and cross-device continuity.

**Highlights:** On-device and cloud AI integration, Side-by-side response comparison, Live web context retrieval, In-chat chart generation, Cross-device conversation continuity, Voice input and spoken responses, File and photo analysis

**Features:** Apple Watch app, iPhone Duo support

**In-app purchases:** none


### Celestis

[App page](https://appshunter.io/ios/app/celestis/id6781116681)

This AI assistant empowers professionals with private, on-device intelligence for document analysis and knowledge retrieval. It offers offline capabilities, custom AI models built from your data, and supports various AI providers for ultimate flexibility and data sovereignty.

**Highlights:** On-device AI with Apple Intelligence, Offline AI capabilities, Private Capsules for custom AI models, Support for multiple AI providers, Near 100% accurate, sourceable answers, Document ingestion from various formats

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Parallax free?

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

### Is Celestis free?

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

### Which has better reviews, Parallax or Celestis?

Parallax and Celestis are both rated 5.0 out of 5 on the App Store, from 1 and 4 ratings respectively.

### Do Parallax or Celestis have ads?

Neither Parallax nor Celestis shows ads.

### Which is updated more often, Parallax or Celestis?

Parallax ships an update every 2 days, and Celestis every 2 weeks. Most recently, Parallax was updated on October 28, 2026 and Celestis on October 23, 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.*