# Sirius vs TechStack by JSP

The clearest difference is ads: Sirius at none against TechStack by JSP's shown. TechStack by JSP's advantage is update cadence (daily vs fortnightly). On price, in-app purchases, device support and iOS requirement there is nothing between them.

Both are free to download. Sirius sells 2 in-app purchases, starting at $6.99 per 7 days and TechStack by JSP sells 9 in-app purchases, starting at $9.99 per month. Whichever you choose, the download price is not the number that matters.

Sirius ships an update fortnightly, TechStack by JSP daily. The most recent releases landed on June 1, 2026 and September 7, 2026 respectively.

## The numbers

| Metric | Sirius | TechStack by JSP |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/sirius-ai-chat-and-custom-bot/id6505104997/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | Fortnightly | **Daily** |
| Monetization | Free with in-app purchases | — |
| Size | 107 MB | 80 MB |
| Requires iOS | 15.0 | **14.0.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 17+ |
| Developer | [FURKAN ZEKIRI](https://appshunter.io/developer/1751931359) | [Daryl Marcano](https://appshunter.io/developer/1688013135) |

## What reviewers say

### Sirius

[App page](https://appshunter.io/ios/app/sirius-ai-chat-and-custom-bot/id6505104997)

Create personalized AI models and chat with your documents. Get instant answers from PDFs and TXTs, and build AI personas with unique tones and expertise. Experience fast, accurate responses powered by advanced intelligence.

**Highlights:** Chat with PDF and TXT files, Create custom AI personas, Personalized AI models, Advanced AI intelligence, Fast and accurate responses

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly | $6.99 | per 7 days |
| Monthly | $19.99 | per month |


### TechStack by JSP

[App page](https://appshunter.io/ios/app/techstack-by-jsp/id6739455072)

**Features:** macOS Compatibility, Apple Wallet

**In-app purchases (9)**

| Purchase | Price | Billing |
| --- | --- | --- |
| TechStack (United States) | $9.99 | per month |
| TechStack (United States) | $24.99 | per 3 months |
| TechStack (United States) | $44.99 | per 6 months |
| TechStack (United States) | $49.99 | per 3 months |
| TechStack (United States) | $74.99 | per year |
| TechStack (United States) | $89.99 | per 6 months |
| TechStack (United States) | $124.99 | per 3 months |
| TechStack (United States) | $239.99 | per 6 months |
| TechStack (United States) | $449.99 | per year |


## Frequently asked questions

### Is Sirius free?

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

### Is TechStack by JSP free?

TechStack by JSP is free to download, with in-app purchases available.

### Do Sirius or TechStack by JSP have ads?

TechStack by JSP shows ads; Sirius does not.

### Which is updated more often, Sirius or TechStack by JSP?

Sirius ships an update fortnightly, and TechStack by JSP daily. Most recently, Sirius was updated on June 1, 2026 and TechStack by JSP on September 7, 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.*