# 随机数 vs SIFDC环控

The clearest difference is in-app purchases: SIFDC环控 at none against 随机数's 3. SIFDC环控 also leads on iOS requirement (11.0 vs 14.0). 随机数's advantage is update cadence (every 3 months vs every 28 months). On price, ads and device support there is nothing between them.

Both are free to download. 随机数 sells 3 in-app purchases, starting at $0.99 per month. SIFDC环控 asks for nothing beyond the download.

随机数 ships an update every 3 months, SIFDC环控 every 28 months. The most recent releases landed on October 29, 2026 and May 15, 2026 respectively.

## The numbers

| Metric | 随机数 | SIFDC环控 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (81 ratings)](https://appshunter.io/ios/app/id1458304992/reviews)** | — |
| Number of ratings | **81** | — |
| Positive reviews | 91.2% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 28 months |
| Monetization | Freemium | — |
| Size | 33 MB | 42 MB |
| Requires iOS | 14.0 | **11.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [海云 吴](https://appshunter.io/developer/1078143101) | [Shi Pu Information Technology (Shanghai) Co., Ltd.](https://appshunter.io/developer/1406216198) |

## What reviewers say

### 随机数

[App page](https://appshunter.io/ios/app/id1458304992)

Generate lucky numbers, aid decision-making, or create random selections for games. This app offers extensive customization for number ranges, batch generation, and even voice playback for random draws. Unlock advanced features and remove ads with a PRO subscription.

**Highlights:** Generate random numbers (0-999999999), Batch random number generation, Customizable number ranges, Voice playback for random draws, Random password generation, History of random draws

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly subscription | $0.99 | per month |
| Yearly subscription | $1.99 | per year |
| 去广告专业版 | $2.99 | one-time |


### SIFDC环控

[App page](https://appshunter.io/ios/app/sifdc/id1589437294)

**In-app purchases:** none


## Frequently asked questions

### Is 随机数 free?

随机数 is free to download, with in-app purchases available.

### Is SIFDC环控 free?

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

### Do 随机数 or SIFDC环控 have ads?

Neither 随机数 nor SIFDC环控 shows ads.

### Which is updated more often, 随机数 or SIFDC环控?

随机数 ships an update every 3 months, and SIFDC环控 every 28 months. Most recently, 随机数 was updated on October 29, 2026 and SIFDC环控 on May 15, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*