# Fastly Observe vs Simple TypeScript

The clearest difference is iOS requirement: Simple TypeScript at 15.6 against Fastly Observe's 26.0. 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.

## The numbers

| Metric | Fastly Observe | Simple TypeScript |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | — | Every 3 weeks |
| Size | 10 MB | 66 MB |
| Requires iOS | 26.0 | **15.6** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Fastly, Inc.](https://appshunter.io/developer/1861643314) | [YUKI TANAIKE](https://appshunter.io/developer/478558546) |

## What reviewers say

### Fastly Observe

[App page](https://appshunter.io/ios/app/fastly-observe/id6760856250)

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

**In-app purchases:** none


### Simple TypeScript

[App page](https://appshunter.io/ios/app/simple-typescript/id6782952296)

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

**In-app purchases:** none


## Frequently asked questions

### Is Fastly Observe free?

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

### Is Simple TypeScript free?

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

### Do Fastly Observe or Simple TypeScript have ads?

Neither Fastly Observe nor Simple TypeScript shows ads.

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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.*