fuelTool vs HOTs.
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
fuelTool
This aviation tool simplifies fuel uplift and weight calculations, allowing users to determine limiting mass, allowable fuel, or payload. It supports various unit conversions and can store aircraft data for faster calculations.
- Fuel uplift calculation (LBS/KG to LTR)
- Split fuel calculation for left & right tanks
- Weight calculation for limiting mass, fuel, or payload
- Crosswind calculation with METAR data
- Aircraft data management (add, edit, delete)
- Downloadable company aircraft data
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fuelTool is a fuel uplift and (limiting) weight calculator and can be used in general by any one in aviation to calculate limiting mass very easily. If you or your company supplies information about the DOW, DOI and limiting masses, then your aircrafts can be downloaded into the app, which makes the calculating even faster, because all the relevant figures are already in place! Features: - Calculate refueling from LBS->LTR or KG->LTR, and split Left & Right Tanks - Calculate with fuel density figures (after re-feuling) - Weight calculation (determine limiting mass, allowable fuel or payload) - Crosswind calculation, with actual METAR info (if you have an internet connection) - Maintain list of aircrafts (add/edit/delete) - Download your company's aircraft data (if made available to me)
HOTs.
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.
- Real-time hazard monitoring
- Interactive 3D globe visualization
- SIGMETs, PIREPs, AIREPs
- Turbulence reports
- High-level hazard overlays
- Pilot-focused interface
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HOTs is an operational flight intelligence platform built for professional pilots. Originally designed as a winter operations holdover calculator, HOTs has evolved into a comprehensive aviation hazard and situational awareness tool — delivering critical operational data in a clean, pilot-focused interface. Monitor aviation hazards worldwide through an interactive 3D globe: • SIGMETs • PIREPs • AIREPs • Turbulence reports • High-level hazard overlays See threats at cruise levels, oceanic routes, and continental airspace in real time. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://lagary.com/one/privacy-policy.html
Screenshots
Verdict
The clearest difference is review sentiment: HOTs. at 100% against fuelTool's 50%. HOTs. also leads on update cadence (every 5 days vs every 3 months). fuelTool's advantage is in-app purchases (none vs 1) and iOS requirement (8.0 vs 18.6). On price, ads and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. HOTs. sells 1 in-app purchase, starting at $9.99 per year. fuelTool asks for nothing beyond the download.
fuelTool ships an update every 3 months, HOTs. every 5 days. The most recent releases landed on November 1, 2026 and November 4, 2026 respectively.
| Parameter | fuelTool | HOTs. |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) — better | — |
| Positive reviews | 50.0% of reviews | 100.0% of reviews — better |
| Number of ratings | 1 — better | — |
| Update frequency | Every 3 months | Every 5 days — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPod | iPhone, iPad |
| Requires iOS | 8.0 — better | 18.6 |
| Further details — not scored | ||
| Size | 2 MB | 74 MB |
| Age rating | 4+ | 4+ |
| Developer | Martin Groesbeek | Lagary Systems, Inc |
Customer experience
fuelTool
HOTs.
In-app purchases
fuelTool
No in-app purchases
HOTs.
- HOTs Full Access3 Days trial$9.991 Year









