Bunker One vs Saybolt Updates
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Bunker One
This app provides a suite of calculators for marine fuel standards, including CCAI, Cetan Index, and blending calculations. It supports ISO 8217 and ASTM standards, with all inputs and outputs in SI units. Users can also access news and updates from the developer.
- ISO 8217 fuel standard lookup
- CCAI Number calculation
- Cetan Index calculation (old & new methods)
- Fuel blending calculators (viscosity, sulphur)
- Injection temperature calculation
- Energy and price relation calculations
- News updates from developer
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This application by Bunker One, is a small practicable tool for look up the ISO 8217 - 2005, 2010/2012, 2017 & 2024 standards for residual- and distillate marine fuels. Programmed calculators are included for different fuel related calculations. Calculators programmed as below.: -CCAI Number according ISO 8217 -Cetan Index ASTM - D 976 - 80 (old method) ASTM - D 4737 - 87 (new method) -Deviation calculations according Bunker One -Energy and price relations according Bunker One -Fuel Blending - Viscosity blending according ASTM - D 7152 Sulphur blending according Bunker One -Injection temperature according Bunker One -Reproducibility -Specific Energy gross and net content according ISO 8217 -Viscosity Index according ASTM - D 341 -Volume Correction Factor according ASTM D1250-80 Table 5B General for all calculators is that all entries shall be in SI units. And results also given in SI units. Where there is a differentiation between Distillates and Residual fuels, distillates are defined with density lower than 900 kg/m3 Where there is a differentiation between Straight Run fuel and Cracked fuels, straight run fuels are defined with density lower than 950 kg/m3 News published on our web page Bunkerone.com will be pushed to the app holders and publish with link to the web under the "news" bar
Saybolt Updates
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With Saybolt Updates you can now access all your nominations on your mobile device. Benefit from easy-overview of all your nominations. Receive real-time updates of delays, timelogs, analysis results or quantity measurements. We will keep you informed where-ever you are. Call your Saybolt contact person directly from the App. Share your nominations with selected colleagues. Mail delay reports and timelogs to third parties. The Saybolt Updates app is meant for Saybolt eUsers. You can register as an eUser following the registration protocol in the app. Only contact persons known in our client data base can register succesfully. Once you have used this app, it will become an indispensible tool to track your loadings, transfers, discharges and testing requests.
Screenshots
Verdict
The clearest difference is iOS requirement: Saybolt Updates at 12.0 against Bunker One's 15.6. 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Bunker One ships an update every 3 months, Saybolt Updates every 4 months. The most recent releases landed on October 16, 2026 and October 10, 2026 respectively.
| Parameter | Bunker One | Saybolt Updates |
|---|---|---|
| Price | Free | Free |
| Rating | 4.5 (2 ratings) — better | — |
| Number of ratings | 2 — better | — |
| Update frequency | Every 3 months — better | Every 4 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 15.6 | 12.0 — better |
| Further details — not scored | ||
| Size | 16 MB | 3 MB |
| Age rating | 4+ | 4+ |
| Developer | Askapps | Saybolt International B.V. |
In-app purchases
Bunker One
No in-app purchases
Saybolt Updates
No in-app purchases








