Comparison

OSTConf vs RuntimeX

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

Head to head
About

OSTConf

Configure your dive computer settings and parameters wirelessly. Update date, time, custom text, gas mixes, and deco settings. Compatible with recent Bluetooth-enabled dive computers.

Highlights
  • Read and modify settings
  • Update date and time
  • Set custom text
  • Configure gas mixes
  • Set deco parameters
  • Upgrade firmware
  • Retrieve device information
Features
Read full description

OSTConf is an application for configuring your OSTC dive computer. It allows you to read and modify settings and parameters of dive computers manufactured by heinrichs weikamp GmbH. Using Bluetooth LE technology, you can retrieve device information, update date and time, custom text, set up your gas mixes and deco parameters as well as upgrading the firmware. OSTConf is compatible with recent Bluetooth-capable OSTC dive computers such as OSTC 2, OSTC plus, OSTC sport, OSTC TR, and OSTC 4. Note that due to the iOS hardware only OSTC devices with BLE are supported. OSTC4: The firmware file contains up to three parts. Please start the firmware update multiple times to ensure that all parts are updated.

About

RuntimeX

Features
Read full description

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

OSTConf4 screens
RuntimeX4 screens

Verdict

The call

The clearest difference is update cadence: RuntimeX at every 2 days against OSTConf's every 5 months. OSTConf's advantage is iOS requirement (16.0 vs 26.0). On price, ads, in-app purchases 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

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

OSTConf ships an update every 5 months, RuntimeX every 2 days. The most recent releases landed on October 6, 2026 and October 7, 2026 respectively.

Scorecard2 real differences · 6 level
OSTConf versus RuntimeX: the parameters behind the verdict, then further details
ParameterOSTConfRuntimeX
PriceFreeFree
Positive reviews25.0% of reviews—
Update frequencyEvery 5 monthsEvery 2 days — better
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS16.0 — better26.0
Further details — not scored
Size3 MB4 MB
Age rating4+4+
DeveloperKai-Uwe SattlerMATTEO GARZULANO

In-app purchases

None

OSTConf

No in-app purchases

None

RuntimeX

No in-app purchases

Questions

Is OSTConf free?
OSTConf is free to download, with no in-app purchases.
Is RuntimeX free?
RuntimeX is free to download, with no in-app purchases.
Do OSTConf or RuntimeX have ads?
Neither OSTConf nor RuntimeX shows ads.
Which is updated more often, OSTConf or RuntimeX?
OSTConf ships an update every 5 months, and RuntimeX every 2 days. Most recently, OSTConf was updated on October 6, 2026 and RuntimeX on October 7, 2026.

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