# Costan vs Perch Door Sim

The clearest difference is update cadence: Costan at every 6 weeks against Perch Door Sim's every 4 months. Perch Door Sim's advantage is iOS requirement (12.1 vs 15.6). On price, review sentiment, ads and in-app purchases there is nothing between them.

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

Costan ships an update every 6 weeks, Perch Door Sim every 4 months. The most recent releases landed on November 10, 2026 and November 2, 2026 respectively.

## The numbers

| Metric | Costan | Perch Door Sim |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[3.0 (2 ratings)](https://appshunter.io/ios/app/perch-door-sim/id1451437811/reviews)** |
| Number of ratings | — | **2** |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 6 weeks** | Every 4 months |
| Monetization | Free | Free |
| Size | 7 MB | 50 MB |
| Requires iOS | 15.6 | **12.1** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Shinichi Aokawa](https://appshunter.io/developer/502862033) | [Mnemo Corp](https://appshunter.io/developer/1153115453) |

## What reviewers say

### Costan

[App page](https://appshunter.io/ios/app/costan/id843202309)

Learn everyday greetings in 14 languages to connect with people worldwide. This app promotes a peaceful, borderless world through simple, friendly communication.

**Highlights:** Learn greetings in 14 languages, Promotes cross-cultural communication, Focuses on everyday phrases, Aims for a peaceful world, Simple and friendly interface

**Features:** Vision Pro support

**In-app purchases:** none


### Perch Door Sim

[App page](https://appshunter.io/ios/app/perch-door-sim/id1451437811)

Transform your apartment's intercom experience with this smart solution. It offers a virtual intercom system, eliminating the need for hardware upgrades. Connect two devices to simulate a modern, functional intercom.

**Highlights:** Virtual intercom system, No hardware needed, Connects two devices, Smart intercom simulation, Apartment building solution

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Costan free?

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

### Is Perch Door Sim free?

Perch Door Sim is free to download, with no in-app purchases.

### Do Costan or Perch Door Sim have ads?

Neither Costan nor Perch Door Sim shows ads.

### Which is updated more often, Costan or Perch Door Sim?

Costan ships an update every 6 weeks, and Perch Door Sim every 4 months. Most recently, Costan was updated on November 10, 2026 and Perch Door Sim on November 2, 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.*