# ZeroSigma vs Shihtzu Trading

The clearest difference is price: ZeroSigma at Free against Shihtzu Trading's $14.99. Shihtzu Trading's advantage is update cadence (fortnightly vs monthly). On rating, review sentiment, ratings volume and ads there is nothing between them.

ZeroSigma is free to download; Shihtzu Trading costs $14.99 up front. ZeroSigma sells 2 in-app purchases, starting at $79.00 per month and Shihtzu Trading sells 1 in-app purchase, starting at $24.99 per month. Whichever you choose, the download price is not the number that matters.

On the App Store both sit at effectively the same score — 5.0 for ZeroSigma against 5.0 for Shihtzu Trading. Both are backed by a comparable volume of ratings — 3 and 4 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

ZeroSigma ships an update monthly, Shihtzu Trading fortnightly. The most recent releases landed on October 23, 2026 and October 22, 2026 respectively.

## The numbers

| Metric | ZeroSigma | Shihtzu Trading |
| --- | --- | --- |
| Price | **Free** | $14.99 |
| Rating | [5.0 (3 ratings)](https://appshunter.io/ios/app/zerosigma/id6762913916/reviews) | [5.0 (4 ratings)](https://appshunter.io/ios/app/shihtzu-trading/id6783430997/reviews) |
| Number of ratings | 3 | **4** |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Monthly | **Fortnightly** |
| Monetization | **Freemium** | Subscription |
| Size | 31 MB | 37 MB |
| Requires iOS | 15.1 | 15.1 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 17+ |
| Developer | [ZeroSigma](https://appshunter.io/developer/1895074107) | [Shihtzu Trading Co., LLC](https://appshunter.io/developer/6783430999) |

## What reviewers say

### ZeroSigma

[App page](https://appshunter.io/ios/app/zerosigma/id6762913916)

This app provides real-time options analytics for traders, focusing on dealer positioning and market structure. It tracks key exposure metrics and strike-level positioning to help understand potential price influences. The mobile interface offers a fast and focused way to monitor market data on the go.

**Highlights:** Real-time exposure metrics, Strike-level positioning insights, SPX/SPY dealer positioning, Fast mobile interface, Secure account access, Options flow and volume tracking

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| ZeroSigma Premium | $79.00 | per month |
| ZeroSigma Premium | $699.00 | per year |


### Shihtzu Trading

[App page](https://appshunter.io/ios/app/shihtzu-trading/id6783430997)

This app translates complex institutional market data into easy-to-understand cards. It helps users identify big money movements and learn to interpret market signals for educational purposes.

**Highlights:** Categorized market data feed, Ticker symbol analysis, Options premium flow board, Plain-English glossary, Alert conviction meter, Clean dark interface

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Shih Tzu Membership | $24.99 | per month |


## Frequently asked questions

### Is ZeroSigma free?

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

### Is Shihtzu Trading free?

Shihtzu Trading costs $14.99, and also offers in-app purchases.

### Which has better reviews, ZeroSigma or Shihtzu Trading?

ZeroSigma and Shihtzu Trading are both rated 5.0 out of 5 on the App Store, from 3 and 4 ratings respectively.

### Do ZeroSigma or Shihtzu Trading have ads?

Neither ZeroSigma nor Shihtzu Trading shows ads.

### Which is updated more often, ZeroSigma or Shihtzu Trading?

ZeroSigma ships an update monthly, and Shihtzu Trading fortnightly. Most recently, ZeroSigma was updated on October 23, 2026 and Shihtzu Trading on October 22, 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.*