# Temtop vs ReadMe

The clearest difference is in-app purchases: Temtop at none against ReadMe's 4. Temtop also leads on iOS requirement (15 vs 18.6). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. ReadMe sells 4 in-app purchases, starting at $4.99 per month. Temtop asks for nothing beyond the download.

Temtop ships an update every 5 weeks, ReadMe monthly. The most recent releases landed on October 8, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | Temtop | ReadMe |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[2.9 (80 ratings)](https://appshunter.io/ios/app/temtop/id1439409326/reviews)** | — |
| Number of ratings | **80** | — |
| Positive reviews | 32.2% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 5 weeks | **Monthly** |
| Monetization | Free | — |
| Size | 183 MB | 374 MB |
| Requires iOS | **15** | 18.6 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Elitech Technology,Inc.](https://appshunter.io/developer/1455057713) | [Rebecca Skinner](https://appshunter.io/developer/1090544689) |

## What reviewers say

### Temtop

[App page](https://appshunter.io/ios/app/temtop/id1439409326)

This app detects formaldehyde, PM2.5, and TVOC using advanced sensors. It provides accurate and reliable environmental data for your home or workspace.

**Highlights:** Formaldehyde detection, PM2.5 detection, TVOC detection, British Dart electrochemical sensor, US TEMTOP laser particle sensor, Accurate and reliable data

**Features:** Vision Pro support

**In-app purchases:** none


### ReadMe

[App page](https://appshunter.io/ios/app/readme-text-to-speech-reader/id6764093392)

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Monthly | $4.99 | per month |
| Ultimate Monthly | $9.99 | per month |
| Pro Yearly | $49.99 | per year |
| Ultimate Yearly | $89.99 | per year |


## Frequently asked questions

### Is Temtop free?

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

### Is ReadMe free?

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

### Do Temtop or ReadMe have ads?

Neither Temtop nor ReadMe shows ads.

### Which is updated more often, Temtop or ReadMe?

Temtop ships an update every 5 weeks, and ReadMe monthly. Most recently, Temtop was updated on October 8, 2026 and ReadMe on October 14, 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.*