# kelvyn — Thermometer for your iPhone

> Displays real-time outdoor temperature from a wearable microcontroller project. (iPhone/iPad app by Robert Werner.)

- Source: https://appshunter.io/ios/app/kelvyn/id6754129704 (this page in markdown: same URL + `.md`)
- Developer: [Robert Werner](https://appshunter.io/developer/1445381419)
- Category: Sports
- Price: Free
- Rating: 5.00/5 from 1 App Store ratings
- Age rating: 4+
- Requires: iOS 17.0 · 4 MB
- Languages: American English
- Released: 2025-10-22
- Data updated: 2026-06-01
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/kelvyn/id6754129704/reviews.md

## What is kelvyn?

Kelvyn  displays the current outside temperature from a wearable  microcontroller project that you build.  It keeps track of the current temperature in either Fahrenheit or Celsius and displays it on an easy to see analog style graphic.  It also keeps track of previous timed reading and graphs it over days, weeks and  months.  It provides averages and trends.  It connects easily with Bluetooth and now provides you with up to the second temperature awareness.

## Key features

- Real-time outdoor temperature display
- Fahrenheit or Celsius support
- Analog-style graphic interface
- Historical temperature graphing
- Average and trend analysis
- Bluetooth connectivity


## Frequently asked questions about kelvyn

### What is kelvyn?

kelvyn is an application that displays the current outside temperature from a wearable microcontroller project you build. It connects via Bluetooth to provide up-to-the-second temperature awareness.

### Does kelvyn require a wearable microcontroller?

Yes, kelvyn is designed to display temperature data from a wearable microcontroller project that you build. It does not function as a standalone weather app.

### What temperature units does kelvyn support?

kelvyn can display the current temperature in either Fahrenheit or Celsius, offering flexibility based on user preference.

### Can kelvyn track temperature history?

Yes, kelvyn keeps track of previous timed readings and graphs them over days, weeks, and months. It also provides averages and trends.

### What devices does kelvyn support?

kelvyn is currently supported on iPhones. It utilizes Bluetooth for connectivity.

### How often is kelvyn updated?

The latest version of kelvyn, 1.0, was released and last updated on October 22, 2025. Future updates will depend on developer plans.

### What is the age rating for kelvyn?

kelvyn has an age rating of 4+, making it suitable for a wide range of users.

### Does kelvyn have ads?

No, kelvyn is ad-free. It does not contain advertisements.

## Version history (last 1 release)

### 1.0 — 2025-10-22

No release notes.

## More apps by Robert Werner

- [WetRuler](https://appshunter.io/ios/app/wetruler/id1445381420)
- [TideView](https://appshunter.io/ios/app/tideview/id1481786133)
- [Coquifinder](https://appshunter.io/ios/app/coquifinder/id6755131507)

All apps by Robert Werner: https://appshunter.io/developer/1445381419

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-01.*