Comparison

Cal C vs Onefeed!

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

Head to head
About

Cal C

This app consolidates numerous essential calculators into a single, user-friendly interface. It offers tools for scientific, financial, programmer, graphing, and statistical calculations, alongside unit and currency conversions. Solve equations, plot graphs, and manage bills without needing multiple applications.

Highlights
  • Comprehensive calculator suite
  • Unit and currency conversion
  • Equation solver
  • Graphing capabilities
  • Financial and programmer tools
  • History and favorites
Features
Read full description

One app, every calculator you actually need — scientific, financial, programmer, graphing, statistics, matrix, plus unit and currency conversion. Stop downloading a new app every time the math changes. You already know what your phone's built-in calculator can't do. Cal C picks up where it stops: solve for x, convert 40 units, work out an EMI, plot a graph, split a dinner bill, turn hex into binary, or check a live currency rate — without leaving the app or hunting for a website. WHAT'S INSIDE Standard — everyday arithmetic, percentages and memory functions, with a history you can search. Scientific — trigonometry, powers, roots, factorials, logs, and constants including pi and e. Equation Solver — enter an equation and get the answer, not just the arithmetic. Financial — EMI, compound and simple interest, ROI, mortgage, tax and inflation calculators. Programmer — binary, octal, decimal and hexadecimal conversion plus full bitwise operations. Unit Converter — length, area, mass, temperature, speed, energy, pressure and more. Currency Converter — live exchange rates for global currencies, in a couple of taps. Graphing — plot and compare multiple equations visually. Matrix — determinants, inverses, addition and multiplication, worked out step by step. Statistics — mean, median, mode, variance and standard deviation from your own data sets. Shapes — volume and surface area for cylinders, cones, cuboids, pyramids and more. Date Calculator — days between two dates, or add and subtract time from any date. Tip Splitter — work out the tip and divide the bill without the awkward silence. Health — BMI and other everyday body metrics. Favourites & Smart Search — pin the tools you use most, or type what you need and jump straight to it. History — every calculation saved and searchable, so you never redo work you've already done. WHO IT'S FOR Students working through coursework. Engineers and developers who need hex and bitwise on hand. Anyone comparing a loan against a lease, or converting currency before a trip. Whoever gets handed the bill at dinner. People who just want a percentage without opening a browser. WHY IT STAYS ON YOUR HOME SCREEN - Every tool one tap away — pin favourites, or search by name - Fast and accurate, with a clean layout that doesn't fight you - Works offline for everything except live currency rates - One download instead of five single-purpose calculators Your everyday calculator, reimagined. Terms & Conditions: https://obsidian-tin-ee3.notion.site/Terms-and-Conditions-32009a72d7508089a28add4379351d81?pvs=73 Currency conversion in Cal C uses exchange rate data from the Frankfurter API, which provides foreign exchange reference rates published by the European Central Bank.

About

Onefeed!

Consolidate content from numerous social media platforms and RSS feeds into a single, unified timeline. Enjoy a clean interface without algorithmic manipulation and without needing to create an account.

Highlights
  • Unified timeline for multiple platforms
  • Supports Reddit, Twitter/X, Instagram, YouTube, and more
  • No algorithmic feed manipulation
  • No account required
  • Supports RSS feeds
  • Clean interface
Features
Read full description

OneFeed pulls together Reddit, Twitter/X, Tiktok, Instagram, YouTube, Bluesky, Mastodon, Telegram, Hacker News, Tumblr, RSS, Vichan and more!.. All into a single clean timeline. No algorithm. No account required. YT: https://www.youtube.com/@OnefeedOfficial Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ INFO: https://onefeedpolicy.neocities.org/ All currently supported platforms ( more to come! ) : Tiktok, Reddit, Twitter/X, Instagram, YouTube, Bluesky, Mastodon, RSS feeds, Telegram, Hacker News, Tumblr, DeviantArt, Letterboxd, Pixelfed, Substack, Vichan, Pinterest, Twitch, Tumblr, Pixiv... Soon: VK, Github

Screenshots

Cal C4 screens
Onefeed!4 screens

Verdict

The call

The clearest difference is rating: Cal C at 4.6 against Onefeed!'s 4.0. Cal C also leads on in-app purchases (none vs 1) and review sentiment (50% vs 33%). On price, ratings volume, update cadence 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. Onefeed! sells 1 in-app purchase, starting at $0.99 per 3 months. Cal C asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Cal C holds the better App Store score, 4.6 against 4.0. Both are backed by a comparable volume of ratings — 8 and 4 respectively. Written reviews point the same way: 50% of Cal C's written reviews are positive against 33% of Onefeed!'s.

UpkeepUpdate frequency

Cal C ships an update every 2 weeks, Onefeed! weekly. The most recent releases landed on November 9, 2026 and November 5, 2026 respectively.

Scorecard4 real differences · 6 level
Cal C versus Onefeed!: the parameters behind the verdict, then further details
ParameterCal COnefeed!
PriceFreeFree
Rating4.6 (8 ratings) — better4.0 (4 ratings)
Positive reviews50.0% of reviews — better33.3% of reviews
Number of ratings8 — better4
Update frequencyEvery 2 weeksWeekly — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFreeFree
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS15.0 — better16.4
Further details — not scored
Size30 MB26 MB
Age rating4+12+
DeveloperPinki .Pierce Kotnik

Customer experience

Cal C

All ratings8 ratings
Positive87.5%
Neutral12.5%
Negative0.0%
Written reviews2 reviews
Positive50.0%
Neutral50.0%
Negative0.0%

Onefeed!

All ratings4 ratings
Positive75.0%
Neutral0.0%
Negative25.0%
Written reviews3 reviews
Positive33.3%
Neutral0.0%
Negative66.7%

In-app purchases

None

Cal C

No in-app purchases

1 purchases

Onefeed!

Subscriptions1
  • Onefeed+ Subscription$0.993 Months

Questions

Is Cal C free?
Cal C is free to download, with no in-app purchases.
Is Onefeed! free?
Onefeed! is free to download, with in-app purchases available.
Which has better reviews, Cal C or Onefeed!?
Cal C is rated higher. Cal C averages 4.6 out of 5 from 8 ratings, while Onefeed! averages 4.0 from 4 ratings.
Do Cal C or Onefeed! have ads?
Neither Cal C nor Onefeed! shows ads.
Which is updated more often, Cal C or Onefeed!?
Cal C ships an update every 2 weeks, and Onefeed! weekly. Most recently, Cal C was updated on November 9, 2026 and Onefeed! on November 5, 2026.

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