# OpenSourceInitiative vs Acidity

The clearest difference is update cadence: OpenSourceInitiative at monthly against Acidity's every 4 months. OpenSourceInitiative also leads on iOS requirement (11.0 vs 15.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

OpenSourceInitiative ships an update monthly, Acidity every 4 months. The most recent releases landed on October 13, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | OpenSourceInitiative | Acidity |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.2 (10 ratings)](https://appshunter.io/ios/app/acidity-view-page-archives/id6472630023/reviews)** |
| Number of ratings | — | **10** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Monthly** | Every 4 months |
| Monetization | — | Free |
| Size | 21 MB | 8 MB |
| Requires iOS | **11.0** | 15.0 |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, iPod, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Meir Tsvi](https://appshunter.io/developer/1048958019) | [Octalwise](https://appshunter.io/developer/1717359953) |

## What reviewers say

### OpenSourceInitiative

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

**Features:** macOS Compatibility

**In-app purchases:** none


### Acidity

[App page](https://appshunter.io/ios/app/acidity-view-page-archives/id6472630023)

This utility extension for Safari provides quick access to archived versions of web pages. It allows users to manually navigate to archives or set up automatic redirection based on custom regex patterns.

**Highlights:** Access archived page versions, Toolbar action for quick access, Regex matching for automatic navigation, Safari extension

**Features:** Safari Extension, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is OpenSourceInitiative free?

OpenSourceInitiative is free to download, with no in-app purchases.

### Is Acidity free?

Acidity is free to download, with no in-app purchases.

### Do OpenSourceInitiative or Acidity have ads?

Neither OpenSourceInitiative nor Acidity shows ads.

### Which is updated more often, OpenSourceInitiative or Acidity?

OpenSourceInitiative ships an update monthly, and Acidity every 4 months. Most recently, OpenSourceInitiative was updated on October 13, 2026 and Acidity on October 8, 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.*