Comparison

SubFeeds vs CalcKey

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

Head to head
About

SubFeeds

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
Read full description

SubFeeds is the smartest AI-powered RSS reader, built to simplify and enhance the way you consume news. Seamlessly aggregate your favorite blogs, news sites, and newsletters into one clean, personalized feed—on Web or iOS. **What’s New in SubFeeds** • AI-Powered Summaries & Sentiment Tags Quickly grasp the essence of any article and understand its sentiment at a glance. • One-Tap Subscribe & Cross-Device Sync Add RSS/Atom feeds instantly and enjoy seamless synchronization between devices. • Smart Filters, Tags & Highlights Organize by topic, keyword, or sentiment, so you see exactly what matters most. • Clean, Distraction-Free Reading All-new UI with Dark Mode for comfortable reading in any environment. • Offline Reading & Full-Text Extraction Never miss an update—access full articles anytime, anywhere. • Privacy-First & Ad-Free Your reading habits stay private. No tracking. No ads. Join thousands of RSS enthusiasts who rely on SubFeeds daily to stay informed and focused. Whether you follow tech blogs, niche newsletters, or mainstream news, SubFeeds helps you read smarter. **Ready to reclaim your attention? Download SubFeeds today.**

About

CalcKey

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
Read full description

CalcKey – Smart Calculator Keyboard Calculate Instantly. Anywhere. Anytime. No more switching between apps just to do quick math! With CalcKey, you get a powerful calculator app and an intelligent keyboard extension — so you can calculate right inside Messages, Notes, Mail, or any app without ever leaving your screen. Key Features: - Keyboard Calculator Extension – Instantly calculate while chatting or typing. Works in Messages, WhatsApp, Notes, and more! - Real-Time Results – Get instant answers as you type. - Basic & Scientific Calculators – From quick sums to advanced equations, CalcKey does it all. - Calculation History – View, copy, or reuse past results easily. - Haptic Feedback – Enjoy subtle vibrations for a smooth typing experience. - Smart Formatting – Supports decimals, thousands separators, and clear result display. - Works Everywhere – Use it as a standalone app or directly from your keyboard. Perfect for messaging apps! Reply, calculate, and chat — all without leaving the conversation. CalcKey makes multitasking effortless. Subscription Pricing, Policy & Terms: - Monthly Plan - $3.99/per month - LifeTime Access - $19.99/One time charge - Subscription automatically renews unless auto-renew is turned off at least 24 - hours before the end of the current period. - Payment will be charged to iTunes Account at confirmation of purchase. - Account will be charged for renewal within 24-hours prior to the end of the current period. - No cancellation of the current subscription is allowed during the active subscription period. - Subscriptions may be managed by the user and auto-renewal may be turned off by going to the user's Account Settings after purchase. - Any unused portion of a free trial period will be forfeited when the user purchases a subscription. Terms & Condition: https://www.righttracksit.com/calckey/terms Privacy Policy: https://www.righttracksit.com/calckey/privacy-policy

Screenshots

SubFeeds4 screens
CalcKey4 screens

Verdict

The call

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.

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

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

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.

Scorecard6 real differences · 4 level
SubFeeds versus CalcKey: the parameters behind the verdict, then further details
ParameterSubFeedsCalcKey
PriceFreeFree
Rating4.3 (3 ratings) — better3.8 (8 ratings)
Positive reviews100.0% of reviews — better0.0% of reviews
Number of ratings38 — better
Update frequencyEvery 4 days — betterEvery 3 weeks
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPodiPhone, iPad, iPod — better
Requires iOS13.0 — better15
Further details — not scored
Size63 MB14 MB
Age rating4+4+
DeveloperSubaio LimitedRight Tracks IT Limited

Customer experience

SubFeeds

All ratings3 ratings
Positive66.7%
Neutral33.3%
Negative0.0%
Written reviews6 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

CalcKey

All ratings8 ratings
Positive62.5%
Neutral0.0%
Negative37.5%
Written reviews2 reviews
Positive0.0%
Neutral50.0%
Negative50.0%

In-app purchases

None

SubFeeds

No in-app purchases

2 purchases

CalcKey

Subscriptions1
  • CalcKey Pro Monthly3 Days trial$3.991 Month
One-time1
  • One time purchase$19.99

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.

Other comparisons