Comparison

Bellows Design Software vs O

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

Head to head
About

Bellows Design Software

This application assists in designing metallic bellows type expansion joints according to EJMA Standards. It allows users to input various design parameters and movement inputs to ensure safe and reliable usage. The software performs comprehensive calculations and checks against EJMA conditions for different bellows configurations and materials.

Highlights
  • Design metallic bellows expansion joints
  • Input internal diameter, convolution height, ply thickness, pitch, and number of plies
  • Set design pressure, temperature, and movements
  • Check design parameters against EJMA Standards
  • Calculations for single and dual bellows
  • Includes vibration and bellows forming methods
  • Calculations for tie rods, lugs plate, and hinges
Read full description

Bellows Design Software is developed based on EJMA Standards 10th edition. Useful in designing Metallic Bellows type Expansion joints for safe and reliable usage. Select Internal Diameter of Bellows, Convolution Height, Ply thickness, Pitch and Number of Plies. Set Design Pressure and Temperature. Choose Bellows Materials,  Input Axial, Lateral and Angular Movements. Include Collar, Spool and Cycle Life and GO. App checks the design parameters with all set of Conditions to be met as per EJMA Standard. Calculations include Single, Dual Bellows with over a long list of Materials. Other Features : Includes Vibration, Bellows Forming Methods - ( in the creep range, above the creep range ) Calculations for Annealed Bellows. Set Factors - Weld Factor, Fatigue Safety Factor and Forming Method Factor Set Constants for Axial Vibration and Lateral Vibration. Separate Calculations for Tie Rods, Lugs Plate and Hinges are included. Terms of Use : https://sites.google.com/view/bellowsdesignsoftware Privacy Policy : https://sites.google.com/view/bellowsdesignsoftware

About

O

Features
Read full description

Some of the main features of the application are: • Calculator: easily define what the geometrical parameters for rock blasting should be. • Safety: Measure the ground vibration and acoustics levels of the blast site. • Data tables: Find out acceptable levels of vibration, glossary used in the explosive industry, linear charge of the explosive according to different diameters and desities of explosive and etc. • Products: Learn more about the range of solutions O-Pitblast can offer you to optimize your drilling and rock blasting solutions.

Screenshots

Bellows Design Software4 screens
O4 screens

Verdict

The call

The clearest difference is in-app purchases: O at none against Bellows Design Software's 2. O also leads on iOS requirement (12.0 vs 16.0). Bellows Design Software's advantage is ads (none vs shown). On price, update cadence 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. Bellows Design Software sells 2 in-app purchases, starting at $34.99 per month. O asks for nothing beyond the download.

UpkeepUpdate frequency

Bellows Design Software ships an update monthly, O every 2 weeks. The most recent releases landed on September 15, 2026 and December 23, 2025 respectively.

Scorecard3 real differences · 6 level
Bellows Design Software versus O: the parameters behind the verdict, then further details
ParameterBellows Design SoftwareO
PriceFreeFree
Rating5.0 (1 ratings) — better—
Number of ratings1 — better—
Update frequencyMonthlyEvery 2 weeks — better
AdsNo — betterYes
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, MaciPhone, iPad, iPod
Requires iOS16.012.0 — better
Further details — not scored
Size26 MB52 MB
Age rating4+4+
DeveloperV PUGAZHENTHIO-Pitblast, Lda.

In-app purchases

2 purchases

Bellows Design Software

Subscriptions2
  • All Access for Bellows3 Days trial$34.991 Month
  • All Access for Bellows Design14 Days trial$299.991 Year
None

O

No in-app purchases

Questions

Is Bellows Design Software free?
Bellows Design Software is free to download, with in-app purchases available.
Is O free?
O is free to download, with no in-app purchases.
Do Bellows Design Software or O have ads?
O shows ads; Bellows Design Software does not.
Which is updated more often, Bellows Design Software or O?
Bellows Design Software ships an update monthly, and O every 2 weeks. Most recently, Bellows Design Software was updated on September 15, 2026 and O on December 23, 2025.

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