# Pi-Anniversary

> Customizable anniversary tracker and reminder app with flexible time units. (iPhone/iPad app by Sestra Studio.)

- Source: https://appshunter.io/ios/app/pi-anniversary/id566743904 (this page in markdown: same URL + `.md`)
- Developer: [Sestra Studio](https://appshunter.io/developer/566743907)
- Category: Lifestyle, Social Networking
- Price: Free
- Rating: 5.00/5 from 2 App Store ratings
- Age rating: 4+
- Requires: iOS 16.6 · 4 MB
- Languages: American English, Russian
- Released: 2012-11-02
- Data updated: 2026-06-01
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/pi-anniversary/id566743904/reviews.md

## What is Pi?

Never forget another event again! Pi-Anniversary will save the date and remind you when its anniversary is coming up. Be it one year, six months, Pi * 10^3 days or 0x77777 seconds. Ever wanted to measure your child’s age according to the Mayan calendar? With many anniversary parameters built-in and the option to create your own to match what’s means most to you, Pi-Anniversary is the perfect choice to keep track of nerdy events. Important or mundane, sad or happy, there will always be an occasion to commemorate with Pi-Anniversary.

## Key features

- Save and track anniversaries
- Customizable reminders
- Support for various time units
- Create custom event parameters
- Track nerdy and significant events


## Frequently asked questions about Pi

### How does Pi-Anniversary help me remember events?

Pi-Anniversary saves your important dates and provides timely reminders. You can set custom parameters for when you want to be notified, ensuring you never forget an anniversary.

### Can I track events with unusual time measurements in Pi-Anniversary?

Yes, Pi-Anniversary supports various anniversary parameters, including days, months, and even custom units like Pi * 10^3 days or 0x77777 seconds, catering to unique tracking needs.

### What kind of events can I track with Pi-Anniversary?

You can track any event, from significant milestones and happy occasions to sad memories or even 'nerdy' events like measuring a child's age by the Mayan calendar.

### Is Pi-Anniversary available on Android devices?

Based on the provided data, Pi-Anniversary is currently supported on iPhone devices. Compatibility with other platforms may vary.

### How often is Pi-Anniversary updated?

The latest version of Pi-Anniversary is 4.5, and it was last updated on March 2, 2026. This indicates a recent update, suggesting ongoing support and development.

### What is the user sentiment for Pi-Anniversary?

Pi-Anniversary has received a perfect rating of 5.0 stars from 2 ratings, indicating very positive user sentiment among its current users.

### Does Pi-Anniversary have ads?

No, Pi-Anniversary does not contain advertisements. It is a free application that provides an ad-free experience for users.

### What is the age rating for Pi-Anniversary?

Pi-Anniversary has an age rating of 4+, making it suitable for a wide range of users, including younger individuals.

## Version history (last 5 releases)

### 4.5 — 2026-03-02

Updated and modernized. Some critical issues fixed.

### 4.4 — 2023-12-24

Updated to newer iOS version
Minor bug fixes
Updated New Years

### 4.3 — 2021-01-28

- Pull down bug fixed
- Updated to iOS 12.4

### 4.2 — 2021-01-27

Updated to latest OS and libraries

### 4.01 — 2018-02-21

-crash fixed

## Apps similar to Pi

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Birthday Countdown Lumi](https://appshunter.io/ios/app/birthday-countdown-lumi/id6759916207) | 5.0 (2) | Free | Lifestyle |
| [Jubilee Seoul Church](https://appshunter.io/ios/app/jubilee-seoul-church/id847710355) | 5.0 (2) | Free | Lifestyle |
| [Anniversaries: Anniversary App](https://appshunter.io/ios/app/anniversaries-anniversary-app/id1625712368) | 4.8 (12) | Free | Lifestyle |
| [Ori](https://appshunter.io/ios/app/ori/id1226562115) | 4.7 (22) | Free | Lifestyle |
| [Daily Persona: Today I Am](https://appshunter.io/ios/app/daily-persona-today-i-am/id6450616950) | 5.0 (9) | Free | Lifestyle |
| [Anniversaries: Dates & Alerts](https://appshunter.io/ios/app/anniversaries-dates-and-alerts/id6503432377) | — | Free | Lifestyle |

## More apps by Sestra Studio

- [eGO-Utah](https://appshunter.io/ios/app/ego-utah/id838465910)
- [eGO SF](https://appshunter.io/ios/app/ego-sf/id928165890)
- [eGO Kyoto](https://appshunter.io/ios/app/ego-kyoto/id995094597)
- [eGO Boston](https://appshunter.io/ios/app/ego-boston/id1031697454)
- [eGO-Ireland](https://appshunter.io/ios/app/ego-ireland/id1054483946)

All apps by Sestra Studio: https://appshunter.io/developer/566743907

## Related topics

[piday](https://appshunter.io/ios/topics/piday)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-01.*