Attic Calendar vs Petgu
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Attic Calendar
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.
- 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)
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Attic Calendar allows you to track the calendar used in ancient Athens, including toggleable date markers for solstices and equinoxes, moon phases (as seen from Athens, Greece), and ancient Greek festivals and related events as recorded by Hellenion. A lock screen widget and home screen widgets are available to help you keep track of the days and festivals at a glance. The calendar is calculated using the following rules: 1. The earliest supported Olympiad and year (Ol. 1.1) is defined as starting in the summer of 776 BCE. 2. For calculation purposes, days start at sunset as they did in ancient Greece, though for display purposes the days can start at midnight via the app's settings. 3. The start of a new month begins when a new moon is more than 20 hours before sunset. In other words, if the new moon was more than 20 hours before sunset, the sunset would start a new month, but if the new moon was less than 20 hours, the moon would be considered to not yet be visible to the naked eye and therefore the month would start the following day. 4. The beginning of a new year started at the beginning of a new month after the summer solstice. 5. In years with 13 months, the extra month has been added after Poseideon as Poseideon II, as was frequently done. Note that historical dates are calculated using the above rules rather than referencing the specific dates used in the past. The Attic calendar was not always consistently modified in ancient Athens. For example, the intercalated 13th month could be inserted at different times in the year and with a different name. These variations are not captured in this app. The HMEPA calendar (used by Hellenion) is also supported now! Special thanks to HMEPA and Hellenion for their contributions to Attic calendar research. HMEPA - http://www.numachi.com/~ccount/hmepa/About.html Hellenion - https://www.hellenion.org Though Hellenion festivals are supported by the app, this app is neither associated with nor produced by Hellenion.
Petgu
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Petgu is a shared management app designed for people who consider their pets as family. Invite family members, friends, and pet sitters to share information, chat, and keep a daily journal together. Key Features • Member Invitations Invite family, friends, or sitters to collaboratively manage your pet family. • Chat Easily communicate about daily updates, requests, and anything related to your pets. • Diary Record walks, meals, health changes, and small moments from each day. • Schedule Management Keep track of vaccinations, vet visits, grooming appointments, and other important events. • Dark Mode Comfortably use the app even at night with a fully supported dark mode. Your pets are precious family members. Start a warmer, safer, and more connected pet-care life with Petgu.
Screenshots
Verdict
The clearest difference is in-app purchases: Petgu at none against Attic Calendar's 1. Petgu also leads on iOS requirement (15.1 vs 17.0). On price, update cadence, ads and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Attic Calendar sells 1 one-off in-app purchase. Petgu asks for nothing beyond the download.
Attic Calendar ships an update weekly, Petgu every 2 weeks. The most recent releases landed on November 7, 2026 and November 9, 2026 respectively.
| Parameter | Attic Calendar | Petgu |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (6 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 6 — better | — |
| Update frequency | Weekly — better | Every 2 weeks |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 17.0 | 15.1 — better |
| Further details — not scored | ||
| Size | 94 MB | 71 MB |
| Age rating | 4+ | 4+ |
| Developer | Thomas Lee | Hyo Jang |
In-app purchases
Attic Calendar
- Remove Ads$3.00
Petgu
No in-app purchases









