# ZIG SIM PRO vs Tract

The clearest difference is price: Tract at Free against ZIG SIM PRO's $3.99. ZIG SIM PRO's advantage is update cadence (monthly vs every 19 months) and iOS requirement (13.0 vs 26.0). On ads, in-app purchases and device support there is nothing between them.

Tract is free to download; ZIG SIM PRO costs $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ZIG SIM PRO ships an update monthly, Tract every 19 months. The most recent releases landed on September 22, 2026 and September 15, 2026 respectively.

## The numbers

| Metric | ZIG SIM PRO | Tract |
| --- | --- | --- |
| Price | $3.99 | **Free** |
| Rating | **[3.9 (8 ratings)](https://appshunter.io/ios/app/zig-sim-pro/id1481556614/reviews)** | — |
| Number of ratings | **8** | — |
| Positive reviews | 60.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Monthly** | Every 19 months |
| Monetization | Paid | — |
| Size | 4 MB | 20 MB |
| Requires iOS | **13.0** | 26.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [1-10, INC.](https://appshunter.io/developer/1447864635) | [Mikito Nakahara](https://appshunter.io/developer/1760683335) |

## What reviewers say

### ZIG SIM PRO

[App page](https://appshunter.io/ios/app/zig-sim-pro/id1481556614)

This app enables physical prototyping by sending sensor and ARKit feature point data to a specified device. It supports various communication protocols and message types for IoT experimentation without electronic kits.

**Highlights:** Send sensor and ARKit feature point data, Monitor feature point data with ARKit, TCP and UDP communication, Supports OSC and JSON message types, Save sensor data to local file, Selectable communication intervals (1-60 FPS)

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

**In-app purchases:** none


### Tract

[App page](https://appshunter.io/ios/app/tract-memo-for-fieldwork/id6738284476)

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

**In-app purchases:** none


## Frequently asked questions

### Is ZIG SIM PRO free?

ZIG SIM PRO costs $3.99, with no in-app purchases.

### Is Tract free?

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

### Do ZIG SIM PRO or Tract have ads?

Neither ZIG SIM PRO nor Tract shows ads.

### Which is updated more often, ZIG SIM PRO or Tract?

ZIG SIM PRO ships an update monthly, and Tract every 19 months. Most recently, ZIG SIM PRO was updated on September 22, 2026 and Tract on September 15, 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.*