# Pair Cale vs Retinal

The clearest difference is in-app purchases: Retinal at none against Pair Cale's 2. Pair Cale's advantage is update cadence (every 5 days vs fortnightly). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Pair Cale sells 2 one-off in-app purchases. Retinal asks for nothing beyond the download.

Pair Cale ships an update every 5 days, Retinal fortnightly. The most recent releases landed on September 23, 2026 and September 8, 2026 respectively.

## The numbers

| Metric | Pair Cale | Retinal |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.0 (1 ratings)](https://appshunter.io/ios/app/pair-cale/id1376462458/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 31.3% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 5 days** | Fortnightly |
| Monetization | Free with in-app purchases | — |
| Size | 12 MB | 1 MB |
| Requires iOS | **16.6** | 17.0 |
| Devices | iPhone | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Kazumasa Shimomura](https://appshunter.io/developer/1110502851) | [Nico Rohrbach](https://appshunter.io/developer/662717596) |

## What reviewers say

### Pair Cale

[App page](https://appshunter.io/ios/app/pair-cale/id1376462458)

Easily share and sync work schedules in real-time with your partner. Ideal for couples with shift work, offering automatic updates, custom shifts, and a clean interface for effortless coordination.

**Highlights:** Real-time schedule synchronization, Automatic updates, Customizable shift names and colors, Offline access to synced schedules, Intuitive and minimalist design, Privacy-focused secure design

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Show rokuyo(六曜) | $1.99 | one-time |
| Hide advertising | $2.99 | one-time |


### Retinal

[App page](https://appshunter.io/ios/app/retinal/id1564557619)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Pair Cale free?

Pair Cale is free to download, with in-app purchases available.

### Is Retinal free?

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

### Do Pair Cale or Retinal have ads?

Neither Pair Cale nor Retinal shows ads.

### Which is updated more often, Pair Cale or Retinal?

Pair Cale ships an update every 5 days, and Retinal fortnightly. Most recently, Pair Cale was updated on September 23, 2026 and Retinal on September 8, 2026.

---

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