# ZenSim vs Gauge King

The clearest difference is in-app purchases: ZenSim at none against Gauge King's 1. ZenSim also leads on iOS requirement (15.1 vs 17.2). Gauge King's advantage is update cadence (every 5 days vs every 3 weeks). On price, ads and device support there is nothing between them.

Both are free to download. Gauge King sells 1 in-app purchase, starting at $9.99 per year. ZenSim asks for nothing beyond the download.

ZenSim ships an update every 3 weeks, Gauge King every 5 days. The most recent releases landed on November 8, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | ZenSim | Gauge King |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.7 (3 ratings)](https://appshunter.io/ios/app/zensim/id6499236479/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | 80.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 5 days** |
| Monetization | Free | — |
| Size | 53 MB | 8 MB |
| Requires iOS | **15.1** | 17.2 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 9+ | 4+ |
| Developer | [ZenSim](https://appshunter.io/developer/1742862711) | [Mark Ross](https://appshunter.io/developer/1885041786) |

## What reviewers say

### ZenSim

[App page](https://appshunter.io/ios/app/zensim/id6499236479)

Manage your eSIMs, purchase travel data plans, and monitor your usage. This app allows you to activate new eSIMs, order add-ons, and change your service plan easily.

**Highlights:** eSIM activation, Buy travel eSIMs, Account management, Usage monitoring, Order add-ons, Change plan

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

**In-app purchases:** none


### Gauge King

[App page](https://appshunter.io/ios/app/gauge-king/id6777585502)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Gauge King Premium | $9.99 | per year |


## Frequently asked questions

### Is ZenSim free?

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

### Is Gauge King free?

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

### Do ZenSim or Gauge King have ads?

Neither ZenSim nor Gauge King shows ads.

### Which is updated more often, ZenSim or Gauge King?

ZenSim ships an update every 3 weeks, and Gauge King every 5 days. Most recently, ZenSim was updated on November 8, 2026 and Gauge King on November 5, 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.*