# Attic Calendar vs Sheaf

The clearest difference is rating: Attic Calendar at 5.0 against Sheaf's 4.5. Sheaf's advantage is in-app purchases (none vs 1). On price, review sentiment, ratings volume and update cadence there is nothing between them.

Both are free to download. Attic Calendar sells 1 one-off in-app purchase. Sheaf asks for nothing beyond the download.

Attic Calendar holds the better App Store score, 5.0 against 4.5. Both are backed by a comparable volume of ratings — 6 and 4 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

Attic Calendar ships an update weekly, Sheaf every 2 weeks. The most recent releases landed on October 18, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | Attic Calendar | Sheaf |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (6 ratings)](https://appshunter.io/ios/app/attic-calendar/id6504639335/reviews)** | [4.5 (4 ratings)](https://appshunter.io/ios/app/sheaf-plural-system-tracker/id6766770364/reviews) |
| Number of ratings | **6** | 4 |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Weekly** | Every 2 weeks |
| Monetization | Free with in-app purchases | **Free** |
| Size | 263 MB | 23 MB |
| Requires iOS | **17.0** | 17.6 |
| Devices | iPhone, iPad | **iPhone, iPad, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [Thomas Lee](https://appshunter.io/developer/1753164877) | [Lupine Systems](https://appshunter.io/developer/1896323717) |

## What reviewers say

### Attic Calendar

[App page](https://appshunter.io/ios/app/attic-calendar/id6504639335)

Explore the ancient Athenian calendar with this app. Track solstices, equinoxes, moon phases, and ancient Greek festivals. Features include customizable widgets for at-a-glance viewing and detailed calculation rules for historical accuracy.

**Highlights:** Ancient Athenian calendar tracking, Solstice and equinox markers, Moon phase tracking, Ancient Greek festivals and events, Lock screen and home screen widgets, Customizable day start (sunset/midnight)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $3.00 | one-time |


### Sheaf

[App page](https://appshunter.io/ios/app/sheaf-plural-system-tracker/id6766770364)

This app helps plural systems track members, manage switches, and keep journals. It offers cross-platform support and prioritizes user privacy with an open-source, self-hostable option.

**Highlights:** Track system members and front changes, Write member and system journals, Manage member groups, Send front change notifications, Cross-platform support (mobile, web, wearable), Open-source and self-hostable

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Attic Calendar free?

Attic Calendar is free to download, with in-app purchases available.

### Is Sheaf free?

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

### Which has better reviews, Attic Calendar or Sheaf?

Attic Calendar is rated higher. Attic Calendar averages 5.0 out of 5 from 6 ratings, while Sheaf averages 4.5 from 4 ratings.

### Do Attic Calendar or Sheaf have ads?

Neither Attic Calendar nor Sheaf shows ads.

### Which is updated more often, Attic Calendar or Sheaf?

Attic Calendar ships an update weekly, and Sheaf every 2 weeks. Most recently, Attic Calendar was updated on October 18, 2026 and Sheaf on October 15, 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.*