Comparison

Dive Log vs OSTConf

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

Head to head
About

Dive Log

Log your SCUBA dives with detailed information, including GPS coordinates and dive buddy details. Supports metric and imperial units, and integrates with desktop software for comprehensive dive history management.

Highlights
  • SCUBA diving logbook
  • GPS coordinate capture
  • Dive buddy integration
  • Dive data and statistics
  • Metric and Imperial units
  • Dive computer data import
  • Bluetooth LE transfer
Features
Read full description

Dive Log is designed to work either as your primary SCUBA diving logbook application or in conjunction with compatible 3rd party desktop logbook applications. You can use Dive Log at the dive site or on the dive boat to capture the information about the site while it is fresh in your mind (or your dive guide's mind). You can even capture the GPS coordinates of the dive site using the built in location services of your iOS device. Details about your actual dive can be added immediately after your dive or at the après dive event and later be saved to your desktop computer. The dive buddy feature is fully integrated with Contacts on your iPhone or iPad, letting you capture information about your newest dive buddy or quickly add an existing buddy to a particular dive. The dive data and statistics features let you have an immediate answer the next time your dive guide asks how much weight you used on your last dive or have all the information you need about your dive history when you fill out that next dive waiver. Metric and Imperial values are supported for all appropriate logbook fields. You can easily enter values using the appropriate units for the situation and view them in your preferred measurement system. You can even explore detailed dive profiles from popular dive computers that you download with your desktop software and later upload to Dive Log on iPhone/iPad. Dive profile data can also be transferred directly from certain dive computers directly via Bluetooth or using a supported Bluetooth accessory and an associated in-app purchase. On Windows, Diving Log 6.0 (www.divinglog.de) is fully integrated with Dive Log on iPhone/iPad and has built in synchronization. Diving Log 6.0 has extensive support for importing data from dive computers and other dive log applications. On Mac OS X, logbook information can be imported to Dive Log on iPhone/iPad from a number of compatible applications using the free Dive Log Manager application available from More Mobile Software (www.moremobilesoftware.com/divelog-sync). DiveLogDT (available on the Mac App Store) can be used to directly import a number of dive computers and file formats and can synchronize with Dive Log on iOS. Dive data can be directly downloaded on a Bluetooth LE (Bluetooth 4.0/5.0) compatible iPhone, iPad or iPod touch from Bluetooth LE capable dive computers such as the Suunto EON Steel, Suunto EON Core, Suunto D5, Scubapro Galileo 2 (G2), Aladin Sport (Matrix), Aladin H (Matrix), G2 HUD, Aladin A1, Shearwater Teric, Peregrine, Petrel 2, Petrel 3, Perdix, Perdix AI, Perdix 2, NERD 2, Oceanic VTX, Pro Plus 4, Geo 4.0, VEO 4.0, Aeris A300CS, Aqualung i300C, i330R, i550C, i750TC, i770R, Apeks DSX, Sherwood Wisdom 4, Mares Genius and certain heinrichs weikamp OSTC computers as well as the DiveNav Inc. bluebuddy and Tech Buddy dive logger accessories. Supported Bluetooth LE accessories are available separately. Mares Bluelink Pro is a Bluetooth LE accessory by Mares and available for purchase separately (www.mares.com). The Bluelink Pro allows you transfer dive data from certain Mares dive computers (Puck Pro, Smart, Smart Air, Quad and Quad Air) directly to Dive Log on your Bluetooth LE compatible iPhone, iPad or iPod touch. Dive Computer Buddy (aka DCbuddy) is a Bluetooth LE accessory by DiveNav Inc. (note that the DCbuddy itself is no longer available). The DCbuddy allows you transfer dive data from certain dive computers (including models from Suunto, Oceanic, Aqualung, Aeris, Sherwood, Tusa and Mares) directly to Dive Log on your Bluetooth LE compatible iPhone, iPad or iPod touch.

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.

Screenshots

Dive Log4 screens
OSTConf4 screens

Verdict

The call

The clearest difference is review sentiment: Dive Log at 84% against OSTConf's 25%. Dive Log also leads on update cadence (monthly vs every 5 months) and iOS requirement (14.0 vs 16.0). OSTConf's advantage is price (Free vs $14.99) and in-app purchases (none vs 13). On 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

CostPrice · In-app purchases · Ads · Monetization

OSTConf is free to download; Dive Log costs $14.99 up front. Dive Log sells 11 one-off in-app purchases. OSTConf asks for nothing beyond the download.

UpkeepUpdate frequency

Dive Log ships an update monthly, OSTConf every 5 months. The most recent releases landed on September 26, 2026 and September 19, 2026 respectively.

Scorecard6 real differences · 4 level
Dive Log versus OSTConf: the parameters behind the verdict, then further details
ParameterDive LogOSTConf
Price$14.99Free — better
Rating4.7 (106 ratings) — better—
Positive reviews83.7% of reviews — better25.0% of reviews
Number of ratings106 — better—
Update frequencyMonthly — betterEvery 5 months
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS14.0 — better16.0
Further details — not scored
Size33 MB3 MB
Age rating4+4+
DeveloperGreg MclaughlinKai-Uwe Sattler

Customer experience

Dive Log

All ratings106 ratings
Positive94.3%
Neutral2.8%
Negative2.8%
Written reviews301 reviews
Positive83.7%
Neutral6.6%
Negative9.6%

OSTConf

Written reviews20 reviews
Positive25.0%
Neutral15.0%
Negative60.0%

In-app purchases

11 purchases

Dive Log

One-time11
  • Suunto Bluetooth Download$2.99
  • Mares Bluetooth Download$2.99
  • Crest Bluetooth Download$2.99
Show 8 more
  • Shearwater Download$2.99
  • bluebuddy Download$2.99
  • SCUBAPRO Download$2.99
  • Pelagic Bluetooth Download$2.99
  • Cressi Bluetooth Download$2.99
  • Ratio Bluetooth Download$2.99
  • Halcyon Bluetooth Download$2.99
  • DCbuddy Support$4.99
None

OSTConf

No in-app purchases

Questions

Is Dive Log free?
Dive Log costs $14.99, and also offers in-app purchases.
Is OSTConf free?
OSTConf is free to download, with no in-app purchases.
Do Dive Log or OSTConf have ads?
Neither Dive Log nor OSTConf shows ads.
Which is updated more often, Dive Log or OSTConf?
Dive Log ships an update monthly, and OSTConf every 5 months. Most recently, Dive Log was updated on September 26, 2026 and OSTConf on September 19, 2026.

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