Chaos Clock vs Postplane
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Chaos Clock
Track time and dates according to Discordian principles and Erisian measurements. Features a countdown to X-Day and includes numerous Discordian holidays.
- Discordian date and time measurement
- Erisian Time Measurement
- Countdown to X-Day
- St. Tib's Day and canonical Holydays
- 165 Discordian Holydays
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Timekeeping for Discordians. The first and only App to measure both date & time according to the Principia Discordia and the Erisian Time Measurement – from the first Sweetmorn in the season of Chaos, to the last Setting Orange of The Aftermath. Chaos Clock keeps a running countdown to X-Day, the end of the world according to the Church of the SubGenius! Includes St Tib's Day & the ten canonical Holydays, plus 165 Holydays celebrated by various Discordian denominations: • Pi Approximation Day • Defenestration of Prague Day • St. John the Blasphemist's Day • Festivus • New Year's Eve Eve • and more! Hail Eris! All hail Discordia!
Postplane
A digital canvas for collaborative expression and communication. Share your creations instantly with others viewing your postplanes for synchronized interaction.
- Digital canvas for self-expression
- Collaborative content creation
- Instantly synchronized communication
- Shareable postplanes
- Cross-device compatibility
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Postplane is a digital canvas that you can use to express yourself and collaborate with others. The contents you create are visible to anyone viewing your postplanes to facilitate instantly synchronized collaborative communication.
Screenshots
Verdict
The clearest difference is update cadence: Postplane at every 10 days against Chaos Clock's every 2 months. Chaos Clock's advantage is rating (4.9 vs 4.6) and review sentiment (100% vs 80%). On price, ratings volume, ads and in-app purchases 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. Neither carries in-app purchases, so what you see is what you pay.
Chaos Clock holds the better App Store score, 4.9 against 4.6. Both are backed by a comparable volume of ratings — 12 and 11 respectively. Written reviews point the same way: 100% of Chaos Clock's written reviews are positive against 80% of Postplane's.
Chaos Clock ships an update every 2 months, Postplane every 10 days. The most recent releases landed on October 6, 2026 and October 1, 2026 respectively.
| Parameter | Chaos Clock | Postplane |
|---|---|---|
| Price | Free | Free |
| Rating | 4.9 (12 ratings) — better | 4.6 (11 ratings) |
| Positive reviews | 100.0% of reviews — better | 80.0% of reviews |
| Number of ratings | 12 — better | 11 |
| Update frequency | Every 2 months | Every 10 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod, Apple Watch — better | iPhone, iPad, iPod |
| Requires iOS | 14.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 13 MB | 50 MB |
| Age rating | 12+ | 4+ |
| Developer | Special Treat, LLC | Postplane LLC |
Customer experience
Chaos Clock
Postplane
In-app purchases
Chaos Clock
No in-app purchases
Postplane
No in-app purchases
