# CALC Smart Calculator ± vs Message Keyword Filter

The clearest difference is review sentiment: CALC Smart Calculator ± at 87% against Message Keyword Filter's 29%. CALC Smart Calculator ± also leads on price (Free vs $0.99) and ratings volume (2.4K vs 1). Message Keyword Filter's advantage is in-app purchases (none vs 4) and rating (5.0 vs 4.8). On ads there is nothing between them.

CALC Smart Calculator ± is free to download; Message Keyword Filter costs $0.99 up front. CALC Smart Calculator ± sells 4 in-app purchases, starting at $0.99 per 3 months. Message Keyword Filter asks for nothing beyond the download.

Message Keyword Filter holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: CALC Smart Calculator ± has 2.4K ratings behind it against 1, so its average is the more settled of the two. Written reviews complicate that: 87% of CALC Smart Calculator ±'s written reviews are positive against 29% of Message Keyword Filter's, so the app with the better star average is not the one people write more warmly about.

CALC Smart Calculator ± ships an update fortnightly, Message Keyword Filter every 2 months. The most recent releases landed on November 6, 2026 and November 7, 2026 respectively.

## The numbers

| Metric | CALC Smart Calculator ± | Message Keyword Filter |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| Rating | [4.8 (2.4K ratings)](https://appshunter.io/ios/app/calc-smart-calculator/id576675190/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/message-keyword-filter/id1672730162/reviews)** |
| Number of ratings | **2.4K** | 1 |
| Positive reviews | **87.2% of reviews** | 28.6% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 2 months |
| Monetization | Free with in-app purchases | **Free** |
| Size | 16 MB | 15 MB |
| Requires iOS | **17.0** | 26.0 |
| Devices | **iPhone, iPad, Mac, Apple Watch** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [QApps LLC](https://appshunter.io/developer/395652397) | [Planeta Pigra Co., Ltd.](https://appshunter.io/developer/1738642017) |

## What reviewers say

### CALC Smart Calculator ±

[App page](https://appshunter.io/ios/app/calc-smart-calculator/id576675190)

This app offers a versatile calculator experience with basic, scientific, and advanced modes. It features real-time results, unit conversions, custom functions, and a shareable history. Optimized for various Apple devices, it's designed for ease of use by students, professionals, and scientists.

**Highlights:** Real-time results, Unit and currency conversions, Custom functions and constants, Shareable calculation history, Landscape mode with tape-roll, Gratuity calculator

**Features:** Family Sharing, Apple Watch app, Vision Pro support

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Quarterly Supporter | $0.99 | per 3 months |
| Quarterly Supporter | $1.99 | per 3 months |
| Annual Contributor | $2.99 | per year |
| Annual Contributor | $5.99 | per year |

**What reviewers like**

- 💻 Excellent calculator functionality
- 🎨 Beautiful and clean interface
- 🔢 Displays full calculation history
- 🔍 Useful conversion tools
- 🤖 Seamless Apple Watch integration

**What reviewers complain about**

- 💰 Subscription model introduced
- 🔒 Restricted features behind paywall
- 📊 Calculation bugs and inaccuracies
- 🔄 Unnecessary UI changes frustrate users

**Reported bugs**

- Calculation errors in certain scenarios
- Forced tutorial popup on every launch
- Unreliable widget functionality

**Requested features**

- Ability to easily clear calculation history
- Option to customize button layout
- Support for entering hexadecimal numbers
- Integration with other apps and services


### Message Keyword Filter

[App page](https://appshunter.io/ios/app/message-keyword-filter/id1672730162)

This utility helps manage SMS messages by filtering content based on keywords and senders. It utilizes iOS system extensions for secure, private message classification without data leakage.

**Highlights:** Keyword-based SMS filtering, Sender-specific filtering, Automatic message classification, Secure iOS system extensions, Privacy protection, Easy-to-use interface

**In-app purchases:** none


## Frequently asked questions

### Is CALC Smart Calculator ± free?

CALC Smart Calculator ± is free to download, with in-app purchases available.

### Is Message Keyword Filter free?

Message Keyword Filter costs $0.99, with no in-app purchases.

### Which has better reviews, CALC Smart Calculator ± or Message Keyword Filter?

Message Keyword Filter is rated higher. CALC Smart Calculator ± averages 4.8 out of 5 from 2.4K ratings, while Message Keyword Filter averages 5.0 from 1 ratings.

### Do CALC Smart Calculator ± or Message Keyword Filter have ads?

Neither CALC Smart Calculator ± nor Message Keyword Filter shows ads.

### Which is updated more often, CALC Smart Calculator ± or Message Keyword Filter?

CALC Smart Calculator ± ships an update fortnightly, and Message Keyword Filter every 2 months. Most recently, CALC Smart Calculator ± was updated on November 6, 2026 and Message Keyword Filter on November 7, 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.*