# Kristal RM vs ZH Sec

The clearest difference is update cadence: ZH Sec at monthly against Kristal RM's every 30 months. 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.

Kristal RM ships an update every 30 months, ZH Sec monthly. The most recent releases landed on October 26, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Kristal RM | ZH Sec |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 30 months | **Monthly** |
| Size | 2 MB | 38 MB |
| Requires iOS | 12.2 | **12.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Kristal](https://appshunter.io/developer/1163867990) | [中昊证券有限公司](https://appshunter.io/developer/1701019830) |

## What reviewers say

### Kristal RM

[App page](https://appshunter.io/ios/app/kristal-rm/id1457556507)

**Features:** macOS Compatibility

**In-app purchases:** none


### ZH Sec

[App page](https://appshunter.io/ios/app/zh-sec/id6457945560)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Kristal RM free?

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

### Is ZH Sec free?

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

### Do Kristal RM or ZH Sec have ads?

Neither Kristal RM nor ZH Sec shows ads.

### Which is updated more often, Kristal RM or ZH Sec?

Kristal RM ships an update every 30 months, and ZH Sec monthly. Most recently, Kristal RM was updated on October 26, 2026 and ZH Sec 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.*