# 海拔仪 vs simX

The clearest difference is ads: simX at none against 海拔仪's shown. simX also leads on update cadence (fortnightly vs monthly) and iOS requirement (13.0 vs 15). On price, 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.

海拔仪 ships an update monthly, simX fortnightly. The most recent releases landed on October 31, 2026 and November 6, 2026 respectively.

## The numbers

| Metric | 海拔仪 | simX |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Monthly | **Fortnightly** |
| Size | 16 MB | 40 MB |
| Requires iOS | 15 | **13.0** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [媛媛 钱](https://appshunter.io/developer/1869024065) | [Ywvolt,Inc.](https://appshunter.io/developer/6829414707) |

## What reviewers say

### 海拔仪

[App page](https://appshunter.io/ios/app/id6782098514)

**In-app purchases:** none


### simX

[App page](https://appshunter.io/ios/app/simxesim-and/id6799422809)

**In-app purchases:** none


## Frequently asked questions

### Is 海拔仪 free?

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

### Is simX free?

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

### Do 海拔仪 or simX have ads?

海拔仪 shows ads; simX does not.

### Which is updated more often, 海拔仪 or simX?

海拔仪 ships an update monthly, and simX fortnightly. Most recently, 海拔仪 was updated on October 31, 2026 and simX on November 6, 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.*