# Fluke iSee vs FernCalc

The clearest difference is update cadence: FernCalc at every 2 months against Fluke iSee's every 4 months. Fluke iSee's advantage is device support (3 vs 1) and iOS requirement (11.0 vs 16.0). On price, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Fluke iSee ships an update every 4 months, FernCalc every 2 months. The most recent releases landed on November 3, 2026 and November 6, 2026 respectively.

## The numbers

| Metric | Fluke iSee | FernCalc |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[1.8 (24 ratings)](https://appshunter.io/ios/app/fluke-isee/id6448859058/reviews)** | — |
| Number of ratings | **24** | — |
| Positive reviews | 8.3% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 2 months** |
| Monetization | Free | — |
| Size | 58 MB | 2 MB |
| Requires iOS | **11.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [福禄克测试仪器(上海)有限公司](https://appshunter.io/developer/1651601381) | [Fernique LLC](https://appshunter.io/developer/6804510040) |

## What reviewers say

### Fluke iSee

[App page](https://appshunter.io/ios/app/fluke-isee/id6448859058)

This application connects to a thermal camera accessory to measure temperature and perform thermal imaging detection on your smart device. It's useful for inspections, field observations, and even educational purposes, revealing the hidden world of temperature.

**Highlights:** Real-time temperature measurement, Thermal imaging detection, Connects via Lightning interface, Portable and on-the-go use, Suitable for inspections and education

**In-app purchases:** none


### FernCalc

[App page](https://appshunter.io/ios/app/ferncalc/id6804510038)

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

**In-app purchases:** none


## Frequently asked questions

### Is Fluke iSee free?

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

### Is FernCalc free?

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

### Do Fluke iSee or FernCalc have ads?

Neither Fluke iSee nor FernCalc shows ads.

### Which is updated more often, Fluke iSee or FernCalc?

Fluke iSee ships an update every 4 months, and FernCalc every 2 months. Most recently, Fluke iSee was updated on November 3, 2026 and FernCalc on November 6, 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.*