Comparison

OpenSourceInitiative vs SJ Chmod Calculator

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

Head to head
About

OpenSourceInitiative

Features
Read full description

Open source initiative website app For over 20 years the Open Source Initiative (OSI) has worked to raise awareness and adoption of open source software, and build bridges between open source communities of practice. As a global non-profit, the OSI champions software freedom in society through education, collaboration, and infrastructure, stewarding the Open Source Definition (OSD), and preventing abuse of the ideals and ethos inherent to the open source movement. Open source software is made by many people and distributed under an OSD-compliant license which grants all the rights to use, study, change, and share the software in modified and unmodified form. Software freedom is essential to enabling community development of open source software.

About

SJ Chmod Calculator

Features
Read full description

SJ Chmod Calculator is a free iOS app designed for system administrators, developers, and Linux/Unix users who need to quickly and accurately calculate, understand, and convert Unix file permissions. With its clear and intuitive interface, the app makes it easy to switch between numeric and symbolic representations of file permissions. SJ Chmod Calculator offers two simple methods to obtain or verify file or directory access rights. First mode: Numeric code input (755, 644, 600, etc.) The user enters a 3-digit chmod value. The app instantly displays: – A permissions table (read, write, execute) for each category: User (owner), Group, Others – The equivalent symbolic notation (e.g., rwxr-xr-x) Second mode: Interactive table input The user simply checks the boxes for read (R), write (W), and execute (X) for each category. The app automatically calculates: – The corresponding numeric chmod value – The Unix symbolic permission string Key features: – Instant conversion between numeric and symbolic notation – Visual table of permissions by category (user, group, others) – Intuitive interface, easy to use – Free application A practical tool for all Linux/Unix users Whether you’re a developer, system administrator, student, or advanced user of Unix/Linux systems, SJ Chmod Calculator helps you manage file permissions quickly and effortlessly.

Screenshots

OpenSourceInitiative1 screens
SJ Chmod Calculator3 screens

Verdict

The call

The clearest difference is in-app purchases: OpenSourceInitiative at none against SJ Chmod Calculator's 5. OpenSourceInitiative also leads on ads (none vs shown) and iOS requirement (11.0 vs 16.0). SJ Chmod Calculator's advantage is update cadence (weekly vs monthly). On price 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

Both are free to download. SJ Chmod Calculator sells 5 one-off in-app purchases. OpenSourceInitiative asks for nothing beyond the download.

UpkeepUpdate frequency

OpenSourceInitiative ships an update monthly, SJ Chmod Calculator weekly. The most recent releases landed on September 10, 2026 and September 7, 2026 respectively.

Scorecard4 real differences Β· 2 level
OpenSourceInitiative versus SJ Chmod Calculator: the parameters behind the verdict, then further details
ParameterOpenSourceInitiativeSJ Chmod Calculator
PriceFreeFree
Update frequencyMonthlyWeekly β€” better
AdsNo β€” betterYes
In-app purchasesNo β€” betterYes
DevicesiPhone, iPad, iPod β€” betteriPhone, iPad
Requires iOS11.0 β€” better16.0
Further details β€” not scored
Size21 MB3 MB
Age rating4+4+
DeveloperMeir TsviStephane JAILLIARD

In-app purchases

None

OpenSourceInitiative

No in-app purchases

5 purchases

SJ Chmod Calculator

One-time5
  • A coffee$0.99
  • A cookie$2.99
  • A lemon tart$4.99
Show 2 more
  • No ads$4.99
  • A pizza$9.99

Questions

Is OpenSourceInitiative free?
OpenSourceInitiative is free to download, with no in-app purchases.
Is SJ Chmod Calculator free?
SJ Chmod Calculator is free to download, with in-app purchases available.
Do OpenSourceInitiative or SJ Chmod Calculator have ads?
SJ Chmod Calculator shows ads; OpenSourceInitiative does not.
Which is updated more often, OpenSourceInitiative or SJ Chmod Calculator?
OpenSourceInitiative ships an update monthly, and SJ Chmod Calculator weekly. Most recently, OpenSourceInitiative was updated on September 10, 2026 and SJ Chmod Calculator on September 7, 2026.

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