# Polestar Parallax vs Zeta Sigma Lambda

The clearest difference is update cadence: Polestar Parallax at fortnightly against Zeta Sigma Lambda's every 2 months. Zeta Sigma Lambda's advantage is iOS requirement (12.0 vs 17.0). On price, ads, in-app purchases and device support there is nothing between them.

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

Polestar Parallax ships an update fortnightly, Zeta Sigma Lambda every 2 months. The most recent releases landed on November 3, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Polestar Parallax | Zeta Sigma Lambda |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 2 months |
| Size | 85 MB | 79 MB |
| Requires iOS | 17.0 | **12.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 17+ |
| Developer | [Polestar](https://appshunter.io/developer/1403371934) | [Ricardo Cumberbatch](https://appshunter.io/developer/1455104172) |

## What reviewers say

### Polestar Parallax

[App page](https://appshunter.io/ios/app/polestar-parallax/id1618004435)

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

**In-app purchases:** none


### Zeta Sigma Lambda

[App page](https://appshunter.io/ios/app/zeta-sigma-lambda/id6450674777)

**Features:** macOS Compatibility, Apple Wallet

**In-app purchases:** none


## Frequently asked questions

### Is Polestar Parallax free?

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

### Is Zeta Sigma Lambda free?

Zeta Sigma Lambda is free to download, with no in-app purchases.

### Do Polestar Parallax or Zeta Sigma Lambda have ads?

Neither Polestar Parallax nor Zeta Sigma Lambda shows ads.

### Which is updated more often, Polestar Parallax or Zeta Sigma Lambda?

Polestar Parallax ships an update fortnightly, and Zeta Sigma Lambda every 2 months. Most recently, Polestar Parallax was updated on November 3, 2026 and Zeta Sigma Lambda on October 30, 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.*