# AirProbe D86 vs Guardian Call

The clearest difference is update cadence: AirProbe D86 at every 6 weeks against Guardian Call's every 4 months. AirProbe D86 also leads on device support (3 vs 1) and iOS requirement (12.0 vs 17.0). 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.

AirProbe D86 ships an update every 6 weeks, Guardian Call every 4 months. The most recent releases landed on October 22, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | AirProbe D86 | Guardian Call |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[1.0 (1 ratings)](https://appshunter.io/ios/app/airprobe-d86/id1340899042/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 6 weeks** | Every 4 months |
| Monetization | Free | — |
| Size | 14 MB | 6 MB |
| Requires iOS | **12.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [ORBIS BV](https://appshunter.io/developer/602147201) | [DSIRF GmbH](https://appshunter.io/developer/1494925585) |

## What reviewers say

### AirProbe D86

[App page](https://appshunter.io/ios/app/airprobe-d86/id1340899042)

This application facilitates digital temperature measurement for manual distillation tests, specifically for petroleum products. It allows users to record temperature, time, and speed at defined volume points with a single tap, and offers features for creating and editing distillation methods. The app automatically corrects temperature readings for barometric pressure and thermometer lag, and includes a calibration menu.

**Highlights:** Digital temperature measurement, ASTM D86/D1078/D850 compliant, Record temperature, time, and speed, Create and edit distillation methods, Automatic temperature correction, Device and PT-100 calibration

**Features:** macOS Compatibility

**In-app purchases:** none


### Guardian Call

[App page](https://appshunter.io/ios/app/guardian-call/id6449091355)

**In-app purchases:** none


## Frequently asked questions

### Is AirProbe D86 free?

AirProbe D86 is free to download, with no in-app purchases.

### Is Guardian Call free?

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

### Do AirProbe D86 or Guardian Call have ads?

Neither AirProbe D86 nor Guardian Call shows ads.

### Which is updated more often, AirProbe D86 or Guardian Call?

AirProbe D86 ships an update every 6 weeks, and Guardian Call every 4 months. Most recently, AirProbe D86 was updated on October 22, 2026 and Guardian Call on October 27, 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.*