# Acidity vs Sumr

The clearest difference is rating: Acidity at 4.2 against Sumr's 3.3. Acidity also leads on in-app purchases (none vs 4) and review sentiment (100% vs 80%). Sumr's advantage is update cadence (every 3 weeks vs every 4 months). On price, ratings volume and ads there is nothing between them.

Both are free to download. Sumr sells 4 in-app purchases, starting at $2.99 per month. Acidity asks for nothing beyond the download.

Acidity holds the better App Store score, 4.2 against 3.3. Both are backed by a comparable volume of ratings — 10 and 7 respectively. Written reviews point the same way: 100% of Acidity's written reviews are positive against 80% of Sumr's.

Acidity ships an update every 4 months, Sumr every 3 weeks. The most recent releases landed on November 4, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Acidity | Sumr |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.2 (10 ratings)](https://appshunter.io/ios/app/acidity-view-page-archives/id6472630023/reviews)** | [3.3 (7 ratings)](https://appshunter.io/ios/app/sumr-summarize-it-all/id6503200370/reviews) |
| Number of ratings | **10** | 7 |
| Positive reviews | **100.0% of reviews** | 80.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 3 weeks** |
| Monetization | **Free** | Freemium |
| Size | 8 MB | 117 MB |
| Requires iOS | **15.0** | 18.0 |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Octalwise](https://appshunter.io/developer/1717359953) | [Pavel Larionov](https://appshunter.io/developer/1748326212) |

## What reviewers say

### 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


### Sumr

[App page](https://appshunter.io/ios/app/sumr-summarize-it-all/id6503200370)

Instantly condense web pages, articles, and videos into concise summaries. Ask follow-up questions and reformat content with custom prompts. Supports over 40 languages and offers flexible AI provider options.

**Highlights:** Instant web page summaries, Ask follow-up questions, Customizable summary prompts, Supports 40+ languages, Multiple AI provider options, Local summary storage, iCloud sync across devices

**Features:** macOS Compatibility, Safari Extension, Family Sharing, Vision Pro support

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Subscribe (monthly) | $2.99 | per month |
| Subscribe (yearly) | $22.99 | per year |
| Follow Up | $3.99 | one-time |
| Lifetime | $59.99 | one-time |


## Frequently asked questions

### Is Acidity free?

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

### Is Sumr free?

Sumr is free to download, with in-app purchases available.

### Which has better reviews, Acidity or Sumr?

Acidity is rated higher. Acidity averages 4.2 out of 5 from 10 ratings, while Sumr averages 3.3 from 7 ratings.

### Do Acidity or Sumr have ads?

Neither Acidity nor Sumr shows ads.

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

Acidity ships an update every 4 months, and Sumr every 3 weeks. Most recently, Acidity was updated on November 4, 2026 and Sumr on October 30, 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.*