Comparison

Acidity vs Sumr

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

Head to head
About

Acidity

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
Read full description

Acidity is a Safari extension for navigating to archived versions of pages. Quickly access page archives through a button in the toolbar. Specify regex matches to automatically redirect certain sites to archives.

About

Sumr

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
Read full description

Summarize it all in one tap. Sumr turns webpages, PDFs, YouTube videos, supported social videos, and shared text into clear summaries. Use it from Safari, the Share Sheet, or Shortcuts, then keep every result in one searchable library. WHAT YOU CAN DO • Share content from Safari, Chrome, Files, Mail, Notes, and other apps • Run Summarize Text from Shortcuts or Siri and pass the result into your next action • Summarize webpages, PDFs, YouTube videos, and supported social videos • Ask follow-up questions without leaving the summary • Customize the tone, structure, and focus with your own prompt • Search and filter saved summaries by content type • Export selected summaries or your full library as Markdown • Back up and restore your summary library • Choose your summary language independently of the source CHOOSE HOW YOU USE AI On supported devices, Apple Intelligence can summarize privately on device, even offline, without an API key or Sumr quota. You can also use Sumr's built-in service or bring your own API key from OpenAI, Anthropic, Google Gemini, xAI, or an OpenAI-compatible provider. Bringing your own key does not require a Sumr subscription. SUMR PREMIUM Annual, Monthly, and Lifetime options unlock premium hosted summaries, PDF and supported social-video processing, Deep Sumr visual analysis, and follow-up features. A separate Follow Ups purchase permanently unlocks questions and custom prompts for bring-your-own-key users. Eligible purchases support Family Sharing. BUILT FOR APPLE DEVICES Your summaries and settings sync with iCloud across iPhone and iPad, with support for Apple silicon Macs. Sumr is designed to stay out of the way until you need it. PRIVACY Bring-your-own-key summarization goes directly to your selected provider. Subscriber requests are processed and immediately discarded. Summaries are saved in the app and sync through iCloud. Terms: https://sumr.1ar.io/terms-of-service/ Privacy: https://sumr.1ar.io/privacy-policy/

Screenshots

Acidity2 screens
Sumr4 screens

Verdict

The call

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.

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

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

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.

Scorecard7 real differences · 3 level
Acidity versus Sumr: the parameters behind the verdict, then further details
ParameterAciditySumr
PriceFreeFree
Rating4.2 (10 ratings) — better3.3 (7 ratings)
Positive reviews100.0% of reviews — better80.0% of reviews
Number of ratings10 — better7
Update frequencyEvery 4 monthsEvery 3 weeks — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFreemium
DevicesiPhone, iPad, iPod, Mac — betteriPhone, iPad
Requires iOS15.0 — better18.0
Further details — not scored
Size8 MB117 MB
Age rating4+4+
DeveloperOctalwisePavel Larionov

Customer experience

Acidity

All ratings10 ratings
Positive80.0%
Neutral0.0%
Negative20.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Sumr

All ratings6 ratings
Positive50.0%
Neutral16.7%
Negative33.3%
Written reviews5 reviews
Positive80.0%
Neutral0.0%
Negative20.0%

In-app purchases

None

Acidity

No in-app purchases

4 purchases

Sumr

Subscriptions2
  • Subscribe (monthly)7 Days trial$2.991 Month
  • Subscribe (yearly)7 Days trial$22.991 Year
One-time2
  • Follow Up$3.99
  • Lifetime$59.99

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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