Comparison

Gas Blend Pro vs RuntimeX

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Gas Blend Pro

Features
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Gas Blend Pro is the professional gas blending calculator for technical divers. Calculate Nitrox and Trimix blends using the industry-standard partial pressure method. Track your oxygen and helium storage tanks with automatic deduction. Access preset mixes for common diving blends. Built by divers, for divers. Works completely offline. Zero data collection.

About

RuntimeX

Features
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RuntimeX is a dive planner designed for advanced recreational and technical divers who want to create and manage dive plans in a simple, fast and reliable way. It supports Open Circuit Multi-Gas and Closed Circuit Rebreather (CCR) dives, allowing you to plan complex profiles with gas switches, multiple setpoints and detailed decompression. RuntimeX integrates the Bühlmann ZHL-16C and VPM decompression algorithms, letting you analyze different decompression strategies and generate complete runtimes for every dive. Key Features • Open Circuit Multi-Gas dive planning • CCR support with setpoint management • Bühlmann ZHL-16C and VPM algorithms • Automatic decompression calculation • Nitrox, Trimix and Oxygen support • Gas switch management during the dive • Detailed runtime analysis • Dive profile visualization • Save and edit dive plans • Quick duplication of existing plans • Intuitive interface optimized for field use Designed for technical diving Whether you're planning a simple recreational dive or a complex technical dive with Trimix and accelerated decompression, RuntimeX helps you organize your plan in seconds. The app is designed to provide quick access to essential information, with a clean interface focused on planning. Disclaimer RuntimeX is a dive planning tool. All generated plans must be reviewed and validated by the user before use. The user is solely responsible for the correct execution of the dive and for compliance with all applicable safety procedures.

Screenshots

Gas Blend Pro3 screens
RuntimeX4 screens

Verdict

The call

The clearest difference is iOS requirement: Gas Blend Pro at 18.1 against RuntimeX's 26.0. On price, update cadence, ads and in-app purchases 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

CostPrice · In-app purchases · Ads · Monetization

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

UpkeepUpdate frequency

Gas Blend Pro ships an update every 3 days, RuntimeX every 2 days. The most recent releases landed on September 13, 2026 and June 19, 2026 respectively.

Scorecard1 real difference · 5 level
Gas Blend Pro versus RuntimeX: the parameters behind the verdict, then further details
ParameterGas Blend ProRuntimeX
PriceFreeFree
Update frequencyEvery 3 daysEvery 2 days — better
AdsNoNo
In-app purchasesNoNo
DevicesiPhoneiPhone, iPad — better
Requires iOS18.1 — better26.0
Further details — not scored
Size4 MB4 MB
Age rating4+4+
DeveloperJohannes SixMATTEO GARZULANO

In-app purchases

None

Gas Blend Pro

No in-app purchases

None

RuntimeX

No in-app purchases

Questions

Is Gas Blend Pro free?
Gas Blend Pro is free to download, with no in-app purchases.
Is RuntimeX free?
RuntimeX is free to download, with no in-app purchases.
Do Gas Blend Pro or RuntimeX have ads?
Neither Gas Blend Pro nor RuntimeX shows ads.
Which is updated more often, Gas Blend Pro or RuntimeX?
Gas Blend Pro ships an update every 3 days, and RuntimeX every 2 days. Most recently, Gas Blend Pro was updated on September 13, 2026 and RuntimeX on June 19, 2026.

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