# Sifter vs Freestyle Calculator

The clearest difference is review sentiment: Freestyle Calculator at 100% against Sifter's 29%. Freestyle Calculator also leads on price (Free vs $2.99) and rating (5.0 vs 4.1). Sifter's advantage is in-app purchases (none vs 6) and ratings volume (116 vs 8). On ads, device support and iOS requirement there is nothing between them.

Freestyle Calculator is free to download; Sifter costs $2.99 up front. Freestyle Calculator sells 6 in-app purchases, starting at $0.99 per month. Sifter asks for nothing beyond the download.

Freestyle Calculator holds the better App Store score, 5.0 against 4.1. That said, the two scores are not equally well evidenced: Sifter has 116 ratings behind it against 8, so its average is the more settled of the two. Written reviews point the same way: 29% of Sifter's written reviews are positive against 100% of Freestyle Calculator's.

Sifter ships an update every 3 months, Freestyle Calculator weekly. The most recent releases landed on November 6, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | Sifter | Freestyle Calculator |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | [4.1 (116 ratings)](https://appshunter.io/ios/app/sifter-spam-sms-filter/id1265348258/reviews) | **[5.0 (8 ratings)](https://appshunter.io/ios/app/freestyle-calculator-sci-and-fx/id6760956908/reviews)** |
| Number of ratings | **116** | 8 |
| Positive reviews | 28.6% of reviews | **100.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Weekly** |
| Monetization | Paid | **Freemium** |
| Size | 10 MB | 27 MB |
| Requires iOS | 17.0 | **16.0** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [磊 汪](https://appshunter.io/developer/1063627762) | [锋 邹](https://appshunter.io/developer/1863829052) |

## What reviewers say

### Sifter

[App page](https://appshunter.io/ios/app/sifter-spam-sms-filter/id1265348258)

This app provides a smart spam filter for iOS devices, allowing users to create personalized rules to block unwanted text messages. It prioritizes user privacy with local processing and offers advanced filtering options like regular expressions.

**Highlights:** Customizable filtering rules, Blacklist and whitelist contacts, Regex filtering for advanced control, Local data processing for privacy, Blocks unwanted SMS and MMS

**In-app purchases:** none


### Freestyle Calculator

[App page](https://appshunter.io/ios/app/freestyle-calculator-sci-and-fx/id6760956908)

This app offers real-time expression editing with instant results as you type, eliminating the need for an equals button. It features a searchable history, unit conversions, and customizable keyboard layouts and themes for a personalized calculation experience.

**Highlights:** Real-time expression preview, Live editing with cursor repositioning, Searchable, annotated calculation history, Unit conversions for various metrics, Customizable keyboard layouts and themes, Cloud sync for backup and restore

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| CalcStudio Pro Monthly | $0.99 | per month |
| CalcStudio Pro Annual | $3.99 | per year |
| Small Tip | $0.99 | one-time |
| Medium Tip | $3.99 | one-time |
| CalcStudio Pro Lifetime | $7.99 | one-time |
| Large Tip | $9.99 | one-time |


## Frequently asked questions

### Is Sifter free?

Sifter costs $2.99, with no in-app purchases.

### Is Freestyle Calculator free?

Freestyle Calculator is free to download, with in-app purchases available.

### Which has better reviews, Sifter or Freestyle Calculator?

Freestyle Calculator is rated higher. Sifter averages 4.1 out of 5 from 116 ratings, while Freestyle Calculator averages 5.0 from 8 ratings.

### Do Sifter or Freestyle Calculator have ads?

Neither Sifter nor Freestyle Calculator shows ads.

### Which is updated more often, Sifter or Freestyle Calculator?

Sifter ships an update every 3 months, and Freestyle Calculator weekly. Most recently, Sifter was updated on November 6, 2026 and Freestyle Calculator on November 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.*