Comparison

Nitrox Buddy vs Diving Log

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

Head to head
About

Nitrox Buddy

This application serves as a straightforward calculator for nitrox and enriched air divers. It quickly computes essential dive data such as Maximum Operating Depth (MOD), Equivalent Air Depth (EAD), Best Mix, and Partial Pressure of Oxygen (PPO2). It supports both imperial and metric units and offers a companion watch app for on-the-go calculations.

Highlights
  • Calculate MOD, EAD, Best Mix, PPO2
  • Imperial and metric unit support
  • Sea and fresh water options
  • Selectable max oxygen content
  • Selectable max partial pressure
  • Companion watch app
Features
Read full description

Nitrox Buddy is a no-frills calculator app for nitrox/enriched air divers - use it to quickly calculate the most important data for your dive: Maximum Operating Depth/MOD, Equivalent Air Depth/EAD, Best Mix and PPO2. The app works with imperial or metric measurements, sea or fresh water, and allows you to select the maximum oxygen content and partial pressure. A companion watch app puts lets you perform all these calculations on your wrist.

About

Diving Log

This app serves as a customizable digital logbook for scuba divers. It allows users to record detailed dive information, including depth, time, location, and environmental conditions. Users can also add photos, instructor signatures, and export logs for social sharing.

Highlights
  • Customizable dive logbook
  • Record dive details (depth, time, temp)
  • Map dive point locations
  • Add photos and instructor signatures
  • Export logs to social media
  • Graph display of depth intervals
Features
Read full description

TUSA Diving LOG is a diving logbook app, which enables you to upload log data from TUSA IQ1204 DC Solar Link to your smartphone using Bluetooth® SMART. The TUSA Diving LOG App has many customizable functions to record the details of your dive. Information such as entry time, exit time, dive time, maximum water depth, average water depth, water temperature, air consumption, and much more can be recorded. Customize your dive log by recording dive point locations using maps, add photos, and capture signatures from an instructor. In addition, detailed water depth and warning information can be recorded at intervals, and uploaded to your app. Also you can easily export dive log information as images to share on Facebook, Twitter, or other social media. TUSA Diving LOG can be used independently of TUSA IQ1204 DC Solar link to record basic log information. --TUSA Diving LOG-- • Featuring: - Customizable scuba diving log book (create, edit, and browse log history) - Graph display of depth intervals - Record dive point locations using maps - Export log information as an image to share on social media - Dive instructor verification signature - Ability to toggle ON/OFF all menu display items • Information Recording: - Maximum Water Depth (including graph display and current time) - Average Water Depth - Total Bottom Time (including Entry and Exit Time) - Date - Location - Dive Points (Map Display) - Entry Point (Boat or Beach) - Residual Pressure Start and End Time - Air Consumption - Weather - Wave Height - Current - Wind - Water Temperature - Lowest Water Temperature - Visibility - Gas Type - Cylinder Type & Volume - Safety Factors: N2 & O2 Indicators - Ascent Rate Warning - Decompression Dive Warning - Decompression Depth Warning - PO2 warning - O2 warning - Maximum Depth Alarm - M Value Warning - Weight - Instructors Name - Instructor Verification Signature - Buddy Name - Memo • Creating a New Dive Log with TUSA Diving LOG App - Press the “New Log” button on the home screen to create your new dive log. • How to Pair TUSA IQ1204 DC Solar Link with DiveLog App - When you create a new dive, first press the blue “Link with DC Solar” button on top in order to pair your TUSA IQ1204 DC Solar Link. Press the “Start Search” button displayed at the bottom of the screen. Make sure to follow all instructions on the screen in order to successfully upload your dive log information in the Diving LOG app.

Screenshots

Nitrox Buddy4 screens
Diving Log4 screens

Verdict

The call

The clearest difference is review sentiment: Nitrox Buddy at 96% against Diving Log's 50%. Nitrox Buddy also leads on rating (4.9 vs 1.8) and ratings volume (489 vs 4). Diving Log's advantage is in-app purchases (none vs 1) and iOS requirement (18.0 vs 26.0). On price, update cadence, 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

Both are free to download. Nitrox Buddy sells 1 one-off in-app purchase. Diving Log asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Nitrox Buddy holds the better App Store score, 4.9 against 1.8. That said, the two scores are not equally well evidenced: Nitrox Buddy has 489 ratings behind it against 4, so its average is the more settled of the two. Written reviews point the same way: 96% of Nitrox Buddy's written reviews are positive against 50% of Diving Log's.

UpkeepUpdate frequency

Nitrox Buddy ships an update every 7 months, Diving Log every 9 months. The most recent releases landed on November 1, 2026 and November 2, 2026 respectively.

Scorecard6 real differences · 4 level
Nitrox Buddy versus Diving Log: the parameters behind the verdict, then further details
ParameterNitrox BuddyDiving Log
PriceFreeFree
Rating4.9 (489 ratings) — better1.8 (4 ratings)
Positive reviews95.8% of reviews — better50.0% of reviews
Number of ratings489 — better4
Update frequencyEvery 7 months — betterEvery 9 months
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, Apple WatchiPhone, iPad
Requires iOS26.018.0 — better
Further details — not scored
Size6 MB22 MB
Age rating4+4+
DeveloperGereon SteffensTABATA CO.,LTD.

Customer experience

Nitrox Buddy

All ratings489 ratings
Positive97.3%
Neutral1.8%
Negative0.8%
Written reviews48 reviews
Positive95.8%
Neutral0.0%
Negative4.2%

Diving Log

All ratings3 ratings
Positive33.3%
Neutral0.0%
Negative66.7%
Written reviews2 reviews
Positive50.0%
Neutral0.0%
Negative50.0%

Bugs and requests

Nitrox Buddy

Reported bugs

4 issues
  • iPad icon is ugly
  • MOD limit of 50% O2 despite 100% O2 setting (resolved)
  • MOD limit of 40% O2 (older version)
  • Does not work with older iOS versions

Requested features

4 requests
  • Add MOD 1.5 option
  • Allow MOD calculation up to 100% O2 and indicate max exposure duration
  • Change color for inappropriate mixes (e.g., 50% at 40m)
  • Support older iOS versions (5 & 6)

Diving Log

Not enough reviews yet to summarise bugs or requests.

In-app purchases

1 purchases

Nitrox Buddy

One-time1
  • Tip$0.99
None

Diving Log

No in-app purchases

Questions

Is Nitrox Buddy free?
Nitrox Buddy is free to download, with in-app purchases available.
Is Diving Log free?
Diving Log is free to download, with no in-app purchases.
Which has better reviews, Nitrox Buddy or Diving Log?
Nitrox Buddy is rated higher. Nitrox Buddy averages 4.9 out of 5 from 489 ratings, while Diving Log averages 1.8 from 4 ratings.
Do Nitrox Buddy or Diving Log have ads?
Neither Nitrox Buddy nor Diving Log shows ads.
Which is updated more often, Nitrox Buddy or Diving Log?
Nitrox Buddy ships an update every 7 months, and Diving Log every 9 months. Most recently, Nitrox Buddy was updated on November 1, 2026 and Diving Log on November 2, 2026.

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