# Diagnostics Direct vs HOTs.

The clearest difference is review sentiment: HOTs. at 100% against Diagnostics Direct's 0%. HOTs. also leads on update cadence (every 5 days vs every 2 months). Diagnostics Direct's advantage is in-app purchases (none vs 1) and iOS requirement (13.0 vs 18.6). On price, ads and device support there is nothing between them.

Both are free to download. HOTs. sells 1 in-app purchase, starting at $9.99 per year. Diagnostics Direct asks for nothing beyond the download.

Diagnostics Direct ships an update every 2 months, HOTs. every 5 days. The most recent releases landed on September 24, 2026 and September 30, 2026 respectively.

## The numbers

| Metric | Diagnostics Direct | HOTs. |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 0.0% of reviews | **100.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 5 days** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 61 MB | 74 MB |
| Requires iOS | **13.0** | 18.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Veryon](https://appshunter.io/developer/544008976) | [Lagary Systems, Inc](https://appshunter.io/developer/1705480493) |

## What reviewers say

### Diagnostics Direct

[App page](https://appshunter.io/ios/app/diagnostics-direct/id6450266259)

A fault isolation tool for aircraft technicians, offering quick symptom searches and guided troubleshooting. Its dynamic database is updated with field feedback for improved accuracy.

**Highlights:** Fault isolation solution, Quick symptom search, Intuitive troubleshooting workflows, Dynamic, updated database, Mobile access for technicians

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

**In-app purchases:** none


### HOTs.

[App page](https://appshunter.io/ios/app/hots/id6477919986)

This aviation tool provides pilots with critical operational data and real-time hazard monitoring. Visualize global weather and turbulence reports on an interactive 3D globe for enhanced situational awareness.

**Highlights:** Real-time hazard monitoring, Interactive 3D globe visualization, SIGMETs, PIREPs, AIREPs, Turbulence reports, High-level hazard overlays, Pilot-focused interface

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| HOTs Full Access | $9.99 | per year |


## Frequently asked questions

### Is Diagnostics Direct free?

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

### Is HOTs. free?

HOTs. is free to download, with in-app purchases available.

### Do Diagnostics Direct or HOTs. have ads?

Neither Diagnostics Direct nor HOTs. shows ads.

### Which is updated more often, Diagnostics Direct or HOTs.?

Diagnostics Direct ships an update every 2 months, and HOTs. every 5 days. Most recently, Diagnostics Direct was updated on September 24, 2026 and HOTs. on September 30, 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.*