# nilGPT vs Celestis

The clearest difference is rating: Celestis at 5.0 against nilGPT's 3.0. Celestis also leads on update cadence (every 2 weeks vs every 4 months). nilGPT's advantage is iOS requirement (15.1 vs 26.0). On price, review sentiment, ratings volume and ads there is nothing between them.

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

Celestis holds the better App Store score, 5.0 against 3.0. Both are backed by a comparable volume of ratings — 2 and 4 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

nilGPT ships an update every 4 months, Celestis every 2 weeks. The most recent releases landed on November 5, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | nilGPT | Celestis |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.0 (2 ratings)](https://appshunter.io/ios/app/nilgpt-private-ai/id6754044312/reviews) | **[5.0 (4 ratings)](https://appshunter.io/ios/app/celestis/id6781116681/reviews)** |
| Number of ratings | 2 | **4** |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 2 weeks** |
| Monetization | Free | Free |
| Size | 40 MB | 3.0 GB |
| Requires iOS | **15.1** | 26.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 12+ | 12+ |
| Developer | [Nillion](https://appshunter.io/developer/1846417389) | [Celestis Ai Inc](https://appshunter.io/developer/6781116683) |

## What reviewers say

### nilGPT

[App page](https://appshunter.io/ios/app/nilgpt-private-ai/id6754044312)

This AI chat companion prioritizes your privacy with end-to-end encryption and secure hardware enclaves. It offers various modes like wellness and personal assistance, providing a confidential space for your thoughts and concerns.

**Highlights:** Private and secure AI chat, Encrypted chat data, AI runs in secure hardware enclaves, Multiple AI modes (wellness, personal assistant), Confidential conversations, Mobile-based chat experience

**Features:** macOS Compatibility

**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 nilGPT free?

nilGPT 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, nilGPT or Celestis?

Celestis is rated higher. nilGPT averages 3.0 out of 5 from 2 ratings, while Celestis averages 5.0 from 4 ratings.

### Do nilGPT or Celestis have ads?

Neither nilGPT nor Celestis shows ads.

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

nilGPT ships an update every 4 months, and Celestis every 2 weeks. Most recently, nilGPT was updated on November 5, 2026 and Celestis 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.*