# Three (Rule of 3 Calculator) vs Sortify

The clearest difference is monetization model: Three (Rule of 3 Calculator) at free against Sortify's free with in-app purchases. Sortify's advantage is ratings volume (10 vs 2) and iOS requirement (10.0 vs 15.0). On price, rating, update cadence and ads there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

On the App Store both sit at effectively the same score — 5.0 for Three (Rule of 3 Calculator) against 5.0 for Sortify. That said, the two scores are not equally well evidenced: Sortify has 10 ratings behind it against 2, so its average is the more settled of the two.

Three (Rule of 3 Calculator) ships an update every 3 months, Sortify every 2 months. The most recent releases landed on October 29, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Three (Rule of 3 Calculator) | Sortify |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (2 ratings)](https://appshunter.io/ios/app/three-rule-of-3-calculator/id683066955/reviews) | [5.0 (10 ratings)](https://appshunter.io/ios/app/sortify-inventory-sorted/id1544557390/reviews) |
| Number of ratings | 2 | **10** |
| Positive reviews | — | 80.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 2 months** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 1 MB | 21 MB |
| Requires iOS | 15.0 | **10.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Pericles Maravelakis](https://appshunter.io/developer/392585599) | [ORACLE MULTIMEDIA ENTERPRISES LLC](https://appshunter.io/developer/1544557392) |

## What reviewers say

### Three (Rule of 3 Calculator)

[App page](https://appshunter.io/ios/app/three-rule-of-3-calculator/id683066955)

This utility app helps users perform quick calculations for everyday scenarios like fuel consumption, currency conversion, and grocery shopping. It features a simple interface with options for result display customization and supports dark/light modes.

**Highlights:** Rule of 3 calculations, Currency conversion, Measurement conversions, Grocery shopping calculations, Simple and modern interface, Result display customization, Dark/light mode support

**In-app purchases:** none


### Sortify

[App page](https://appshunter.io/ios/app/sortify-inventory-sorted/id1544557390)

Manage your inventory with ease using this mobile app. Create, add, remove, and log items and categories for household, office, business, or warehouse needs. Streamline your inventory tracking directly from your smartphone.

**Highlights:** Create inventory items, Add and remove items, Log items and categories, Manage household inventory, Track office and business inventory, Support for warehouse inventory

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Three (Rule of 3 Calculator) free?

Three (Rule of 3 Calculator) is free to download, with no in-app purchases.

### Is Sortify free?

Sortify is free to download, with no in-app purchases.

### Which has better reviews, Three (Rule of 3 Calculator) or Sortify?

Three (Rule of 3 Calculator) and Sortify are both rated 5.0 out of 5 on the App Store, from 2 and 10 ratings respectively.

### Do Three (Rule of 3 Calculator) or Sortify have ads?

Neither Three (Rule of 3 Calculator) nor Sortify shows ads.

### Which is updated more often, Three (Rule of 3 Calculator) or Sortify?

Three (Rule of 3 Calculator) ships an update every 3 months, and Sortify every 2 months. Most recently, Three (Rule of 3 Calculator) was updated on October 29, 2026 and Sortify on October 24, 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.*