STEM Connect vs Smoke Tunnel
Price, ratings, monetisation and update history for both apps, side by side ā with what reviewers say about each.
STEM Connect
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Via BLE technology (Bluetooth Low Energy), this app allows to connect and use the ozone generator O3Z-Tech to monitor the sanitisation and download the sanitisation report. Moreover, this app allows to set up and service the stretcher assisted loading system Sherpa. You will find the login credentials in the user manual of the product. This way STEM ensures maximum control of authorized technicians. Setup, use and diagnostics procedures are easy and assisted so to conclude any operation in a simple way.
Smoke Tunnel
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SmokeTunnel for iOS is a client implementation of the Smoke Tunnel protocol. It gives developers, administrators and authorized users a focused way to add a configuration and connect to a compatible Smoke Tunnel server deployed independently by them or their organization. SmokeTunnel is not a subscription or connectivity provider. It does not operate a public server network, issue accounts, sell access, provide a server directory or automatically connect to any commercial provider. ⢠Add or import a server configuration ⢠Set the hostname, port and TCP transport ⢠Configure TLS Server Name (SNI) and proxy-routing options ⢠Set DNS and tunnel-interface values ⢠Enable Connect on Demand where supported ⢠Connect directly to the server you selected ⢠Review, copy and clear temporary on-device session diagnostics The client is an implementation of the protocol rather than a hosted connectivity service.
Screenshots
Verdict
The clearest difference is update cadence: STEM Connect at weekly against Smoke Tunnel's every 3 months. STEM Connect also leads on iOS requirement (12.0 vs 15.0). Smoke Tunnel's advantage is device support (4 vs 2). On price, ads and in-app purchases there is nothing between them.
Scored on Price Ā· Rating Ā· Positive reviews Ā· Number of ratings Ā· Update frequency Ā· Ads Ā· In-app purchases Ā· Monetization Ā· Best chart rank Ā· Devices Ā· Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
STEM Connect ships an update weekly, Smoke Tunnel every 3 months. The most recent releases landed on October 30, 2026 and November 5, 2026 respectively.
| Parameter | STEM Connect | Smoke Tunnel |
|---|---|---|
| Price | Free | Free |
| Update frequency | Weekly ā better | Every 3 months |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPod | iPhone, iPad, iPod, Mac ā better |
| Requires iOS | 12.0 ā better | 15.0 |
| Further details ā not scored | ||
| Size | 32 MB | 25 MB |
| Age rating | 4+ | 12+ |
| Developer | STEM s.r.l. | iElement B.V |
In-app purchases
STEM Connect
No in-app purchases
Smoke Tunnel
No in-app purchases
Questions
Is STEM Connect free?
Is Smoke Tunnel free?
Do STEM Connect or Smoke Tunnel have ads?
Which is updated more often, STEM Connect or Smoke Tunnel?
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