Comparison

Calculator⁼ vs RNN Amplifier

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

Head to head
About

Calculator⁼

This app offers a clean and intuitive interface for both basic arithmetic and advanced scientific calculations. It includes a history tape to review past computations and supports various mathematical operations, making it suitable for everyday use and complex problem-solving.

Highlights
  • Basic & Scientific Calculator
  • Live Currency Converter
  • History Tape
  • Equation Edit Function
  • Degrees or Radians Calculation
  • Memory Banks
Features
Read full description

Calculator is a clean, easy-to-use calculator app for everyday math and more. It handles basic calculations and scientific functions when you need them and keeps a history of your past results so you can quickly go back and check or reuse them. With its classic design, it feels familiar and straightforward—perfect for quick sums at work, school, or home. AVAILABLE FOR FREE • Basic & Scientific Calculator • Great Visibility; Big buttons for easy calculations • Live Currency Converter; get exchange rate prices • History Tape; Track all calculations, taxes, and expenses • Equation edit function • Calculate with Degrees or Radians • Memory Banks • Choose your Decimal Notation • Set the Number of Decimals • Available in 12 languages • Made for iPad & iPhone • Support Split View & Dark Mode BASIC AND SCIENTIFIC Rotate your device to access all scientific buttons. Or if you prefer calculating in portrait mode, simply swipe left. YOUR EXPERIENCE IS IMPORTANT TO US! As your experience is important to us, we’re happy with your feedback, questions, and suggestions. Please share any support as our team is always ready to help via support@impalastudios.com Mathematical Operations Addition, Subtraction, Division, Multiplication, Percentages, Square, Cubic Exponent, Nth Exponent, Square Root, Cubic Root, Nth Root, Engineering Exponent, Factorial, Power of Two, Power of Ten, Power of E, Natural Logarithm, Common Logarithm, Binary Logarithm, Sine, Cosine, Tangent, Arc Sine, Arc Cosine, Arc Tangent, Hyperbolic Sine, Hyperbolic Cosine, Hyperbolic Tangent, Hyperbolic ArcSine, Hyperbolic Arc Cosine, Hyperbolic ArcTangent, Multiplicative Inverse, Random Number Input LOVING CALCULATOR? Please show your support by rating us! Thank you. Calculator (C) 2011 Impala Studios Terms & Conditions: https://impalastudios.com/terms Privacy Policy: https://impalastudios.com/privacy

About

RNN Amplifier

This app amplifies sound for users with hearing loss, utilizing advanced noise reduction and automatic gain control. It requires earphones or a Bluetooth headset for optimal performance and is designed for real-time, high-quality audio.

Highlights
  • Personal Sound Amplifier (PSA)
  • Noise Reduction
  • Automatic Output Gain Control
  • Real-time processing
  • High sound quality
  • Earphone/Bluetooth headset required
Features
Read full description

[WARNING !] Be sure to plug-in your earphone or pair your bluetooth headset with your mobile phone before starting the app. AlgorKorea's development technology created Personal Sound Amplifier (PSA) app The Personal Sound Amplifier app produces loud volume for profound hearing loss. RNN technology Noise Reduction based on probabilistic analysis and automatic output gain control are the main features of AlgorKorea sophisticated Personal Sound Amplifier app. All algorithms are implemented in real-time with high sound quality for hearing impairments. The output audio level may be slightly different based on iphone’s volume settings, microphone and earphone/headset types. Just make sure your IOS version is 12.0 or higher.

Screenshots

Calculator⁼4 screens
RNN Amplifier4 screens

Verdict

The call

The clearest difference is price: Calculator⁼ at Free against RNN Amplifier's $1.99. Calculator⁼ also leads on update cadence (monthly vs every 40 months) and ratings volume (360K vs 1). RNN Amplifier's advantage is in-app purchases (none vs 8) and ads (none vs shown). On device support and iOS requirement 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

Calculator⁼ is free to download; RNN Amplifier costs $1.99 up front. Calculator⁼ sells 8 in-app purchases, starting at $0.49 per 7 days. RNN Amplifier asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

RNN Amplifier holds the better App Store score, 5.0 against 4.6. That said, the two scores are not equally well evidenced: Calculator⁼ has 360K ratings behind it against 1, so its average is the more settled of the two.

UpkeepUpdate frequency

Calculator⁼ ships an update monthly, RNN Amplifier every 40 months. The most recent releases landed on November 12, 2026 and October 5, 2026 respectively.

Scorecard7 real differences · 3 level
Calculator⁼ versus RNN Amplifier: the parameters behind the verdict, then further details
ParameterCalculator⁼RNN Amplifier
PriceFree — better$1.99
Rating4.6 (360K ratings)5.0 (1 ratings) — better
Positive reviews35.6% of reviews—
Number of ratings360K — better1
Update frequencyMonthly — betterEvery 40 months
AdsYesNo — better
In-app purchasesYesNo — better
MonetizationFree with in-app purchases — betterPaid
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS15.014.0 — better
Further details — not scored
Size159 MB2 MB
Age rating4+4+
DeveloperImpala StudiosAlgorKorea Co., Ltd.

Customer experience

Calculator⁼

All ratings358,262 ratings
Positive91.4%
Neutral3.7%
Negative4.9%
Written reviews808 reviews
Positive35.6%
Neutral6.8%
Negative57.5%

RNN Amplifier

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

Bugs and requests

Calculator⁼

Reported bugs

3 issues
  • History not always showing all entries
  • Ads covering up parts of the screen
  • Inability to close full-screen ads

Requested features

4 requests
  • Add fraction button
  • Option to clear calculation history
  • Ability to copy/paste results
  • Customizable layout and themes

RNN Amplifier

Not enough reviews yet to summarise bugs or requests.

In-app purchases

8 purchases

Calculator⁼

Subscriptions6
  • Weekly Premium Access3 Days trial$0.497 Days
  • Monthly full access3 Days trial$1.991 Month
  • Weekly Premium Access3 Days trial$1.997 Days
Show 3 more
  • Limited Time Offer$4.991 Year
  • Premium Yearly3 Days trial$5.991 Year
  • Annual Premium Access$9.991 Year
One-time2
  • Retro Theme Calculator'$0.99
  • Lifetime Full Access$14.99
None

RNN Amplifier

No in-app purchases

Questions

Is Calculator⁼ free?
Calculator⁼ is free to download, with in-app purchases available.
Is RNN Amplifier free?
RNN Amplifier costs $1.99, with no in-app purchases.
Which has better reviews, Calculator⁼ or RNN Amplifier?
RNN Amplifier is rated higher. Calculator⁼ averages 4.6 out of 5 from 360K ratings, while RNN Amplifier averages 5.0 from 1 ratings.
Do Calculator⁼ or RNN Amplifier have ads?
Calculator⁼ shows ads; RNN Amplifier does not.
Which is updated more often, Calculator⁼ or RNN Amplifier?
Calculator⁼ ships an update monthly, and RNN Amplifier every 40 months. Most recently, Calculator⁼ was updated on November 12, 2026 and RNN Amplifier on October 5, 2026.

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