# OpenSourceInitiative vs SJ Chmod Calculator

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.

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

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

## The numbers

| Metric | OpenSourceInitiative | SJ Chmod Calculator |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Monthly | **Weekly** |
| Size | 21 MB | 3 MB |
| Requires iOS | **11.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Meir Tsvi](https://appshunter.io/developer/1048958019) | [Stephane JAILLIARD](https://appshunter.io/developer/1749751077) |

## What reviewers say

### OpenSourceInitiative

[App page](https://appshunter.io/ios/app/opensourceinitiative/id1487779805)

**Features:** macOS Compatibility

**In-app purchases:** none


### SJ Chmod Calculator

[App page](https://appshunter.io/ios/app/sj-chmod-calculator/id6504128434)

**Features:** macOS Compatibility

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| A coffee | $0.99 | one-time |
| A cookie | $2.99 | one-time |
| A lemon tart | $4.99 | one-time |
| No ads | $4.99 | one-time |
| A pizza | $9.99 | one-time |


## Frequently asked 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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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*