# Silo vs Proja AI

The clearest difference is update cadence: Silo at every 2 weeks against Proja AI's every 4 months. Proja AI's advantage is iOS requirement (13.0 vs 18.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Silo sells 4 in-app purchases, starting at $6.99 per 7 days and Proja AI sells 4 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

Silo ships an update every 2 weeks, Proja AI every 4 months. The most recent releases landed on November 5, 2026 and November 9, 2026 respectively.

## The numbers

| Metric | Silo | Proja AI |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.5 (25 ratings)](https://appshunter.io/ios/app/silo-private-ai-chat/id6749483886/reviews)** | — |
| Number of ratings | **25** | — |
| Positive reviews | 50.6% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Every 4 months |
| Monetization | Free with in-app purchases | — |
| Size | 80 MB | 56 MB |
| Requires iOS | 18.0 | **13.0** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Eternis Labs](https://appshunter.io/developer/1764348104) | [Craig Simons](https://appshunter.io/developer/1863639202) |

## What reviewers say

### Silo

[App page](https://appshunter.io/ios/app/silo-private-ai-chat/id6749483886)

Engage in completely private AI conversations. Ask for answers, advice, or support with a secure, judgment-free chatbot. Your data is encrypted and never stored or seen by the developers.

**Highlights:** 100% Private Chat, Encrypted Conversations, Secure & Judgment-Free, AI Assistant for Advice & Support, Document Analysis (Pro), Multiple AI Models (Pro)

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Silo Pro Weekly | $6.99 | per 7 days |
| Silo Pro Monthly | $19.99 | per month |
| Silo Pro Yearly | $249.99 | per year |
| Silo Plus Lifetime | $499.99 | one-time |


### Proja AI

[App page](https://appshunter.io/ios/app/proja-ai/id6756915749)

**Features:** macOS Compatibility

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Monthly | $3.99 | one-time |
| Team Monthly | $5.99 | one-time |
| Pro Yearly | $29.99 | one-time |
| Team Yearly | $49.99 | one-time |


## Frequently asked questions

### Is Silo free?

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

### Is Proja AI free?

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

### Do Silo or Proja AI have ads?

Neither Silo nor Proja AI shows ads.

### Which is updated more often, Silo or Proja AI?

Silo ships an update every 2 weeks, and Proja AI every 4 months. Most recently, Silo was updated on November 5, 2026 and Proja AI on November 9, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*