Comparison

O vs Jahresblick

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

Head to head
About

O

Features
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Who hasn't sometimes wished for assistance when it comes to define the mounting dimensions for O-Rings or even find the right O-Ring? The Hutchinson O-Ring app offers precious tools: β€’ Assembly aid, depending on the installation type (in a bore, on a piston, cover fitting with internal or external pressure) β€’ Compounds compatibility with various fluids β€’ Intelligent O-Ring measuring tool with the smartphone's camera function β€’ Dimensions list for standard parts You can choose a reference number from thousands of available O-Rings and then precisely define the groove dimensions to ensure perfect sealing. On the contrary, after choosing the installation type and the groove dimensions, the app will recommend a list of compatible O-Ring dimensions. A smart measuring tool has been developed to measure your O-Rings dimensions. This can for instance be used in MRO for easy replacement. Take a coin to set the standard and watch your smartphone turn into a digital measure tool for precision seals! If chemistry classes are bad memories for you, the compound compatibility tool will help you to define the appropriate compound family, depending on the fluid used in your application. Bonus : get the PDF calculation results per email ! In order to confirm your choice, we recommend to validate with tests

About

Jahresblick

Visualize your entire year at a glance, showing all 12 months side-by-side with holidays, school breaks, and personal appointments. Easily track vacation days and identify conflicts between personal plans and school schedules, all offline and with a single purchase.

Highlights
  • 12 months visible simultaneously
  • Color-coded entries for vacation, visits, and appointments
  • Official school holidays for all German states
  • Customizable holidays and personal categories
  • Automatic remaining vacation calculation
  • Offline functionality
  • A4 export and sharing options
Features
Read full description

Jahresblick shows you your entire year at a glance: all 12 months, all events, all school holidays and public holidays in a single view. NEW IN VERSION 2 - Year switching from a dropdown: move between years anytime - Calendar sharing: share your yearly overview via iCloud with family or partner - Apple Calendar: view your existing calendars directly in the yearly overview - iCloud synchronisation: your data on all your devices - Custom categories: rename all categories to suit your needs WHAT JAHRESBLICK OFFERS Calendar view All 12 months, horizontally scrollable and adjustable with pinch-to-zoom. Public holidays, school holidays, nursery holidays and your own events, all at a glance. Holiday planning Enter your holiday days and immediately see how many working days remain, with a breakdown by month and by holiday period. Part-time configuration and region-specific public holidays included. School and public holidays Preset school holidays for all German federal states, plus public holidays through to 2028. Add your own holidays whenever you like. Sharing and sync Share your yearly overview via iCloud with your family. Recipients see your events directly in their app, ideal for planning holidays together. Privacy All data is stored locally on your device only, and optionally in your personal iCloud. No servers, no accounts, no advertising. Jahresblick is the app for anyone who prefers to see their year in a single view rather than a rolling monthly calendar.

Screenshots

O4 screens
Jahresblick4 screens

Verdict

The call

The clearest difference is price: O at Free against Jahresblick's $1.99. O also leads on update cadence (every 6 weeks vs every 5 months) and iOS requirement (12.0 vs 17.6). On ads, in-app purchases and device support there is nothing between them.

Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS

CostPrice Β· In-app purchases Β· Ads Β· Monetization

O is free to download; Jahresblick costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

O ships an update every 6 weeks, Jahresblick every 5 months. The most recent releases landed on October 12, 2026 and October 8, 2026 respectively.

Scorecard3 real differences Β· 5 level
O versus Jahresblick: the parameters behind the verdict, then further details
ParameterOJahresblick
PriceFree β€” better$1.99
Positive reviewsβ€”100.0% of reviews
Update frequencyEvery 6 weeks β€” betterEvery 5 months
AdsNoNo
In-app purchasesNoNo
Monetizationβ€”Paid
DevicesiPhone, iPad, iPod β€” betteriPhone, iPad
Requires iOS12.0 β€” better17.6
Further details β€” not scored
Size40 MB4 MB
Age rating4+4+
DeveloperHUTCHINSONPhilipp Huckenbeck

In-app purchases

None

O

No in-app purchases

None

Jahresblick

No in-app purchases

Questions

Is O free?
O is free to download, with no in-app purchases.
Is Jahresblick free?
Jahresblick costs $1.99, with no in-app purchases.
Do O or Jahresblick have ads?
Neither O nor Jahresblick shows ads.
Which is updated more often, O or Jahresblick?
O ships an update every 6 weeks, and Jahresblick every 5 months. Most recently, O was updated on October 12, 2026 and Jahresblick on October 8, 2026.

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