# Temtop vs Subs

The clearest difference is in-app purchases: Temtop at none against Subs's 1. Temtop also leads on ads (none vs shown) and iOS requirement (15 vs 18.6). Subs's advantage is update cadence (fortnightly vs every 5 weeks). On price and device support there is nothing between them.

Both are free to download. Subs sells 1 one-off in-app purchase. Temtop asks for nothing beyond the download.

Temtop ships an update every 5 weeks, Subs fortnightly. The most recent releases landed on October 8, 2026 and September 27, 2026 respectively.

## The numbers

| Metric | Temtop | Subs |
| --- | --- | --- |
| 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** | Yes |
| Update frequency | Every 5 weeks | **Fortnightly** |
| Monetization | Free | — |
| Size | 183 MB | 45 MB |
| Requires iOS | **15** | 18.6 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Elitech Technology,Inc.](https://appshunter.io/developer/1455057713) | [PABLO TURRION SAN PEDRO](https://appshunter.io/developer/1853443733) |

## 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


### Subs

[App page](https://appshunter.io/ios/app/subs/id6760143277)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Subs Premium | $0.99 | one-time |


## Frequently asked questions

### Is Temtop free?

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

### Is Subs free?

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

### Do Temtop or Subs have ads?

Subs shows ads; Temtop does not.

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

Temtop ships an update every 5 weeks, and Subs fortnightly. Most recently, Temtop was updated on October 8, 2026 and Subs on September 27, 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.*