# Calculator⁼ vs RNN Amplifier

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.

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.

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.

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

## The numbers

| Metric | Calculator⁼ | RNN Amplifier |
| --- | --- | --- |
| Price | **Free** | $1.99 |
| Rating | [4.6 (360K ratings)](https://appshunter.io/ios/app/calculator/id487127942/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/rnn-amplifier/id1521187386/reviews)** |
| Number of ratings | **360K** | 1 |
| Positive reviews | 35.6% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Monthly** | Every 40 months |
| Monetization | **Free with in-app purchases** | Paid |
| Size | 159 MB | 2 MB |
| Requires iOS | 15.0 | **14.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Impala Studios](https://appshunter.io/developer/1063279743) | [AlgorKorea Co., Ltd.](https://appshunter.io/developer/1173452285) |

## What reviewers say

### Calculator⁼

[App page](https://appshunter.io/ios/app/calculator/id487127942)

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:** macOS Compatibility, Vision Pro support

**In-app purchases (8)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Premium Access | $0.49 | per 7 days |
| Monthly full access | $1.99 | per month |
| Weekly Premium Access | $1.99 | per 7 days |
| Limited Time Offer | $4.99 | per year |
| Premium Yearly | $5.99 | per year |
| Annual Premium Access | $9.99 | per year |
| Retro Theme Calculator' | $0.99 | one-time |
| Lifetime Full Access | $14.99 | one-time |

**What reviewers like**

- 👍 Easy to use
- 📊 Helpful history feature
- 💻 Versatile (basic and scientific)
- 🔍 Clear display and large buttons

**What reviewers complain about**

- 🤖 Intrusive and excessive ads
- 💰 Subscription model for ad-free version
- 🔄 Ads interrupting calculations
- 🕰️ Slow performance due to ads

**Reported bugs**

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

**Requested features**

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


### RNN Amplifier

[App page](https://appshunter.io/ios/app/rnn-amplifier/id1521187386)

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:** macOS Compatibility

**In-app purchases:** none


## Frequently asked 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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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*