Comparison

All Units vs Seafarer Documents Manager

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

Head to head
About

All Units

This free utility app simplifies unit conversions for various measurements, saving time for technicians, students, and everyday users. It offers a wide range of conversion categories to make calculations easy and accurate.

Highlights
  • Unit conversion
  • Volume
  • Length
  • Mass
  • Temperature
  • Velocity
  • Time
Features
Read full description

This free application can save a lot of time and make your life easier. Ideal for technicians, students and anyone who needs to convert the units ease and accurate. Volume Length Angle Mass Temperature Velocity Time Area Power Pressure Frequency Energy Resistance Potential difference Current Please tell us about your experience and if you have any suggestions for improvement, please send us an email at yvvofficial@yahoo.com

About

Seafarer Documents Manager

Features
Read full description

Seafarer Documents Manager: Your Digital Document Navigator Tired of missing crucial certificate expiry dates? Designed specifically for officers and ratings, Seafarer Documents Manager is an indispensable tool for organizing, tracking, and managing all your maritime documents, certificates, and passports. Take complete control of your career, whether you are onboard or ashore. Key Features for Seafarers Smart Expiry Tracking Add issue and expiration dates for every certificate such as STCW, Medical, GMDSS, and Passport. Receive automatic reminders in advance, three months, one month, and one week before expiry, so you always have time to renew or reissue your documents. A clear visual status indicator shows at a glance which documents are valid and which require attention. Digital Document Organizer Create digital copies of your documents as photos or scans and store them offline directly in the app. Scan paper documents with your camera and save them as compact PDF files. Categorize everything by type, such as License, Endorsement, or Training Certificate, for quick retrieval. Preview your files inside the app at any time. Strong Privacy and Protection Keep your personal data safe with a PIN code or biometrics such as Face ID and Touch ID. Your documents stay on your device, available even without an internet connection. Sea Service Record Keep a complete record of your contracts and vessels, including position, vessel type, sign on and sign off dates, and attach the related documents to each entry. Professional CV in Two Taps Generate a polished maritime CV from your saved data and choose from several professional designs. Each CV includes a contact QR code, so a recruiter can save your details to their phone instantly. Export and share your CV in seconds. Created by a Seafarer, for Seafarers Add your own custom documents to match your specific needs. The app is available in multiple languages. As a professional seafarer, you know how critical it is to have up to date documents at boarding time and during an audit. This app removes the risk of human error and gives you peace of mind. Do not let expired certificates get you rejected. Download Seafarer Documents Manager today and take control of your maritime career. More useful features are coming in future updates. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://sdm.kuka-lab.com/privacy-policy.php Terms of Service: https://sdm.kuka-lab.com/terms-of-service.php

Screenshots

All Units3 screens
Seafarer Documents Manager4 screens

Verdict

The call

The clearest difference is in-app purchases: All Units at none against Seafarer Documents Manager's 2. All Units also leads on update cadence (every 3 days vs fortnightly) and iOS requirement (15.0 vs 17.0). Seafarer Documents Manager's advantage is ads (none vs shown). On price 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. Seafarer Documents Manager sells 2 in-app purchases, starting at $0.99 per month. All Units asks for nothing beyond the download.

UpkeepUpdate frequency

All Units ships an update every 3 days, Seafarer Documents Manager fortnightly. The most recent releases landed on November 3, 2026 and October 31, 2026 respectively.

Scorecard4 real differences · 5 level
All Units versus Seafarer Documents Manager: the parameters behind the verdict, then further details
ParameterAll UnitsSeafarer Documents Manager
PriceFreeFree
Rating5.0 (1 ratings) — better—
Number of ratings1 — better—
Update frequencyEvery 3 days — betterFortnightly
AdsYesNo — better
In-app purchasesNo — betterYes
MonetizationAd-supported—
DevicesiPhone, iPodiPhone, iPad
Requires iOS15.0 — better17.0
Further details — not scored
Size7 MB66 MB
Age rating4+4+
DeveloperVladyslav YarmakMykhaylo Osypov

In-app purchases

None

All Units

No in-app purchases

2 purchases

Seafarer Documents Manager

Subscriptions1
  • Monthly Subscribe$0.991 Month
One-time1
  • Seafarer Documents Manager Premium$11.99

Questions

Is All Units free?
All Units is free to download, with no in-app purchases.
Is Seafarer Documents Manager free?
Seafarer Documents Manager is free to download, with in-app purchases available.
Do All Units or Seafarer Documents Manager have ads?
All Units shows ads; Seafarer Documents Manager does not.
Which is updated more often, All Units or Seafarer Documents Manager?
All Units ships an update every 3 days, and Seafarer Documents Manager fortnightly. Most recently, All Units was updated on November 3, 2026 and Seafarer Documents Manager on October 31, 2026.

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