# SubFeeds vs CalcKey

The clearest difference is review sentiment: SubFeeds at 100% against CalcKey's 0%. SubFeeds also leads on rating (4.3 vs 3.8) and in-app purchases (none vs 2). On price, ratings volume, ads and device support there is nothing between them.

Both are free to download. CalcKey sells 2 in-app purchases, starting at $3.99 per month. SubFeeds asks for nothing beyond the download.

SubFeeds holds the better App Store score, 4.3 against 3.8. Both are backed by a comparable volume of ratings — 3 and 8 respectively. Written reviews point the same way: 100% of SubFeeds's written reviews are positive against 0% of CalcKey's.

SubFeeds ships an update every 4 days, CalcKey every 3 weeks. The most recent releases landed on August 13, 2026 and September 9, 2026 respectively.

## The numbers

| Metric | SubFeeds | CalcKey |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.3 (3 ratings)](https://appshunter.io/ios/app/subfeeds-ai-rss-reader/id6745493906/reviews)** | [3.8 (8 ratings)](https://appshunter.io/ios/app/calckey-calculator-keyboard/id6748647909/reviews) |
| Number of ratings | 3 | **8** |
| Positive reviews | **100.0% of reviews** | 0.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 4 days** | Every 3 weeks |
| Monetization | **Free** | Free with in-app purchases |
| Size | 63 MB | 14 MB |
| Requires iOS | **13.0** | 15 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Subaio Limited](https://appshunter.io/developer/1687419675) | [Right Tracks IT Limited](https://appshunter.io/developer/1803615116) |

## What reviewers say

### SubFeeds

[App page](https://appshunter.io/ios/app/subfeeds-ai-rss-reader/id6745493906)

This AI-powered news aggregator consolidates your favorite blogs, news sites, and newsletters into a single, personalized feed. It offers AI summaries, sentiment analysis, smart filtering, and offline reading for a focused and efficient news consumption experience.

**Highlights:** AI-powered summaries and sentiment tags, One-tap subscribe and cross-device sync, Smart filters, tags, and highlights, Clean, distraction-free reading with Dark Mode, Offline reading and full-text extraction, Privacy-first and ad-free experience

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### CalcKey

[App page](https://appshunter.io/ios/app/calckey-calculator-keyboard/id6748647909)

Perform calculations directly within any app using a smart keyboard extension. Get instant results for basic and scientific equations, with a history of your calculations. Enjoy a seamless typing experience and smart formatting.

**Highlights:** Keyboard calculator extension, Real-time results, Basic & scientific calculators, Calculation history, Smart formatting, Standalone app option

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| CalcKey Pro Monthly | $3.99 | per month |
| One time purchase | $19.99 | one-time |


## Frequently asked questions

### Is SubFeeds free?

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

### Is CalcKey free?

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

### Which has better reviews, SubFeeds or CalcKey?

SubFeeds is rated higher. SubFeeds averages 4.3 out of 5 from 3 ratings, while CalcKey averages 3.8 from 8 ratings.

### Do SubFeeds or CalcKey have ads?

Neither SubFeeds nor CalcKey shows ads.

### Which is updated more often, SubFeeds or CalcKey?

SubFeeds ships an update every 4 days, and CalcKey every 3 weeks. Most recently, SubFeeds was updated on August 13, 2026 and CalcKey on September 9, 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.*