# Temtop > Environmental sensor app for formaldehyde, PM2.5, and TVOC detection. (iPhone/iPad app by Elitech Technology,Inc..) - Source: https://appshunter.io/ios/app/temtop/id1439409326 (this page in markdown: same URL + `.md`) - Developer: [Elitech Technology,Inc.](https://appshunter.io/developer/1455057713) - Category: Utilities, Lifestyle - Price: Free - Rating: 2.90/5 from 80 App Store ratings · 90 written reviews indexed - Age rating: 4+ - Requires: iOS 15 · 183 MB - Languages: American English, French (France), German (Germany), Italian, Chinese (Simplified, China), European Spanish - Released: 2018-11-01 - Data updated: 2026-08-16 - Monetization: free - User reviews in markdown: https://appshunter.io/ios/app/temtop/id1439409326/reviews.md ## What is Temtop? Detection function: formaldehyde, PM2.5, TVOC It is equipped with British Dart formaldehyde electrochemical sensor, which effectively reduces gas interference and makes formaldehyde detection more accurate. Accurate and reliable data using the US TEMTOP laser particle sensor ## Key features - Formaldehyde detection - PM2.5 detection - TVOC detection - British Dart electrochemical sensor - US TEMTOP laser particle sensor - Accurate and reliable data ## Recent user reviews (10 of 90) All indexed reviews: https://appshunter.io/ios/app/temtop/id1439409326/reviews.md ### 3/5 — ALL AROUND BUGGY‼️ *2026-06-26* ALL AROUND BUGGY‼️ Have used this app with about half dozen of their products for years and it’s constantly irritating/disappointing and unnecessarily time-consuming to use. Continuous BLUETOOTH BUGS. SYNCING BUGS. Always offline. Settings and device names don’t sync, etc. Tried with multiple iPads and iPhones so it’s on their end. Yes, I am a foot from the devices. Yes, everything is updated. Also readings jumping around as the power button is pressed. IT IS NOT REAL TIME MONITORING. Must launch app and or press the power button to kick start it. SO FRUSTRATING! Please fix these issues already. ### 3/5 — Sync issue *2026-04-25, version 5.6.4* The app locks when syncing data to the iPhone. Very frustrating. ### 1/5 — Latest update is absolute garbage *2026-02-15, version 5.6.2* App keeps freezing when syncing, causing me to constantly close/reopen. Historical charts older than 30 days are no longer available. Data export is limited to 100 days. And the data saved when I looked this morning was different than what was in the app last night. Terrible UX. ### 3/5 — App mostly works *2026-02-10* It connects just fine and can update most things about my M10+, but it’s janky. The clock updated when I linked the device, but the AM/PM is wrong and I can’t fix that. The app tries to give useful reference information, but it lacks any numeric reference values. It only tells you good, bad, etc, not a reference of where that value sits in what range. Also it wants me to sign up for an account, and we should all agree that’s a terrible thing. Fortunately you can skip it and that gets them a third star. ### 1/5 — I have to agree to have my data collected now? *2026-02-07, version 5.6.2* Even if I continue as a guest, it requires me to agree to share and allow collection of data. For a temperature app… anyways I just came here to say this and then delete the app. ### 3/5 — App needs work *2026-01-20, version 5.6.0* The latest update improved the look and feel but it has some obvious flaws. Scrolling on the data page is poor, data updates are not always reflected on the graphs, I asks me to log in too often and it hangs some times. The app is better in some ways, but worse in others and needs some reliability and UX work. ### 1/5 — Can’t log in after latest update *2026-01-14, version 5.6.0* App makes me log in again after latest update. I enter my email address but it won’t allow me to move to the password field. Pressing done does nothing. It’s like it does not recognize that I entered anything in the email field ### 3/5 — Nice Hardware, Lackluster App *2026-01-14* The app has an issue where users cannot change the temperature unit from Celsius to Fahrenheit on the main display page. Even though my weather app and the unit do display in Fahrenheit, users cannot change how the app displays temperature in Celsius. This is a major issue. Additionally, during the signup process, the keyboard doesn’t disappear properly blocking users from hitting the submit button. ### 1/5 — Poor coding *2025-12-30, version 5.5.8* Can’t even login, junk! ### 1/5 — As of 2026, app is not functional *2025-12-29, version 5.5.8* I cannot create a new account with Apple (“unknown error”) and the email code to create an account doesn’t send, so there is no way to log in or sign up ## Frequently asked questions about Temtop ### What does this app do? This app functions as an environmental sensor, detecting and displaying levels of formaldehyde, PM2.5, and TVOC in your surroundings. It utilizes specialized sensors to provide accurate readings. ### What are the key features of this app? Key features include the detection of formaldehyde, PM2.5, and TVOC. It employs a British Dart formaldehyde electrochemical sensor for enhanced accuracy and a US TEMTOP laser particle sensor for reliable particle data. ### Is this app free to use? Yes, the application is available for free. There are no in-app purchases or advertisements mentioned, suggesting a completely free user experience. ### What kind of devices is this app compatible with? While specific compatibility details are not provided, mobile applications of this nature typically require a compatible smartphone or tablet with Bluetooth or Wi-Fi connectivity to interface with the sensors. ### Who would benefit from using this app? This app is beneficial for anyone concerned about their indoor air quality, including homeowners, parents, individuals with respiratory sensitivities, and those living in areas with high pollution levels. ## Version history (last 5 releases) ### 5.7.4 — 2026-07-20 Fix W100 bugs. ### 5.7.2 — 2026-06-24 Fix W100 bugs. ### 5.6.4 — 2026-04-17 Adaptive M10+WIFI ### 5.6.2 — 2026-02-07 - fix bugs ### 5.6.0 — 2026-01-02 - fix bugs ## Apps similar to Temtop | App | Rating | Price | Category | | --- | --- | --- | --- | | [Welcome by Virtual Doorman](https://appshunter.io/ios/app/welcome-by-virtual-doorman/id1661392590) | 3.5 (26) | Free | Utilities | | [Ora: World Clock](https://appshunter.io/ios/app/ora-world-clock/id6502857758) | 4.9 (68) | Free | Utilities | | [incident.io](https://appshunter.io/ios/app/incidentio/id6471268530) | 4.6 (31) | Free | Utilities | | [Luxmeter - Lux Light Meter](https://appshunter.io/ios/app/luxmeter-lux-light-meter/id6746211051) | 4.4 (208) | Free | Utilities | | [Am I Secure? 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Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-16.*