Archived App
This is an archived listing of the app previously available on the App Store.Although the app is no longer distributed by Apple, you can still view its description, screenshots, version history, ratings, and metadata for reference.
About
This utility app transforms your iPhone or iPad into a thermometer by utilizing a physical probe that plugs into the audio jack. It provides real-time temperature readings in both Celsius and Fahrenheit, with a wide measurement range and no battery requirement.
What's New in J
1.1.0
June 11, 2015
This app has been updated by Apple to display the Apple Watch app icon.
Developer apps
FAQ
How do I use J-Thermo?
Open the J-Thermo app, plug the J-Thermo probe firmly into your iPhone/iPad's audio jack, and turn the headphone volume to maximum. The temperature reading should appear within seconds. Ensure the app is open in portrait mode for correct UI display.
What is the measurement range of J-Thermo?
J-Thermo can measure temperatures from -50 to 150 °C (-58 to 302 °F). Temperatures outside this range are displayed as HH.H (above 150 °C) or LL.L (below -50 °C).
Does J-Thermo require a battery?
No, J-Thermo does not require a battery. It draws power from your iPhone or iPad through the audio jack connection.
What should I do if J-Thermo is not showing a temperature reading?
Ensure your headphone volume is at maximum. If the app shows 'No J-Thermo detected,' try manually setting the volume. Also, check your iPhone/iPad's privacy settings to ensure microphone access is enabled for J-Thermo.
Is J-Thermo compatible with all iPhones and iPads?
J-Thermo is designed for iPhone, iPad, and iPod devices. However, for devices purchased in the EU, an 'EU Volume Limit' in settings might affect its functionality, so it's recommended to turn this off if present.
What is the update frequency for J-Thermo?
The latest version, 1.1.0, was released on June 11, 2015. An update to fix UI issues in landscape mode was planned for release soon after the initial launch.
What is the age rating for J-Thermo?
J-Thermo has an age rating of 4+, making it suitable for a wide range of users.
What are the highest and lowest temperatures J-Thermo can display?
J-Thermo displays the highest and lowest temperatures recorded during a session. It also has specific indicators for temperatures exceeding its measurement range: HH.H for above 150 °C and LL.L for below -50 °C.
