# 66铃声 vs 热力基建

The clearest difference is in-app purchases: 热力基建 at none against 66铃声's 4. 热力基建 also leads on ads (none vs shown). On price, update cadence, device support and iOS requirement there is nothing between them.

Both are free to download. 66铃声 sells 4 in-app purchases, starting at $2.49 per month. 热力基建 asks for nothing beyond the download.

Both ship on a similar rhythm, roughly fortnightly. The most recent releases landed on November 7, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | 66铃声 | 热力基建 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.3 (20 ratings)](https://appshunter.io/ios/app/66/id1517634537/reviews)** | — |
| Number of ratings | **20** | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Fortnightly | Fortnightly |
| Monetization | Free with in-app purchases | — |
| Size | 78 MB | 71 MB |
| Requires iOS | 12.1 | **12.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [ABV Mobile](https://appshunter.io/developer/595885253) | [太原市华森伟业科技发展有限公司](https://appshunter.io/developer/991758164) |

## What reviewers say

### 66铃声

[App page](https://appshunter.io/ios/app/66/id1517634537)

Easily create custom ringtones by extracting audio from videos or audio files. Trim and edit sound clips to personalize your phone's alerts. Supports a wide range of iPhone models.

**Highlights:** Extract audio from videos, Extract audio from audio files, Quick audio trimming, Customizable sound clips, Direct ringtone setting, Wide iPhone model support

**Features:** macOS Compatibility

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 月度VIP会员 | $2.49 | per month |
| 半年VIP会员 | $8.49 | per 6 months |
| 年度VIP-新手特惠 | $8.99 | per year |
| 年度VIP会员 | $9.49 | per year |


### 热力基建

[App page](https://appshunter.io/ios/app/id1613454150)

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

**In-app purchases:** none


## Frequently asked questions

### Is 66铃声 free?

66铃声 is free to download, with in-app purchases available.

### Is 热力基建 free?

热力基建 is free to download, with no in-app purchases.

### Do 66铃声 or 热力基建 have ads?

66铃声 shows ads; 热力基建 does not.

### Which is updated more often, 66铃声 or 热力基建?

66铃声 ships an update fortnightly, and 热力基建 fortnightly. Most recently, 66铃声 was updated on November 7, 2026 and 热力基建 on November 3, 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.*