# 嗖嗖Fly vs LASM

The clearest difference is ads: LASM at none against 嗖嗖Fly's shown. 嗖嗖Fly's advantage is update cadence (fortnightly vs every 2 months) and iOS requirement (13.0 vs 17.6). 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.

嗖嗖Fly ships an update fortnightly, LASM every 2 months. The most recent releases landed on September 30, 2026 and September 26, 2026 respectively.

## The numbers

| Metric | 嗖嗖Fly | LASM |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/fly/id6708228548/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | **Fortnightly** | Every 2 months |
| Monetization | Free | — |
| Size | 124 MB | 6 MB |
| Requires iOS | **13.0** | 17.6 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [北京安擎智飞科技有限公司](https://appshunter.io/developer/1769867334) | [Shanghai Terjin Information Technology Co., Ltd.](https://appshunter.io/developer/649957877) |

## What reviewers say

### 嗖嗖Fly

[App page](https://appshunter.io/ios/app/fly/id6708228548)

This app uses advanced algorithms to scan the sky and identify satellite orbits in real-time. It offers a 3D visualization of constellations and allows users to generate personalized posters of their findings. It's designed for users interested in space technology and celestial observation.

**Highlights:** One-click sky scanning, Real-time satellite orbit tracking, 3D constellation visualization, Personalized 'sky scan' posters, Integration with Beidou/GPS data, Optimized scanning algorithms

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

**In-app purchases:** none


### LASM

[App page](https://appshunter.io/ios/app/lasm/id6762499364)

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

**In-app purchases:** none


## Frequently asked questions

### Is 嗖嗖Fly free?

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

### Is LASM free?

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

### Do 嗖嗖Fly or LASM have ads?

嗖嗖Fly shows ads; LASM does not.

### Which is updated more often, 嗖嗖Fly or LASM?

嗖嗖Fly ships an update fortnightly, and LASM every 2 months. Most recently, 嗖嗖Fly was updated on September 30, 2026 and LASM on September 26, 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.*