Comparison

Pi vs Anniversary Countdown Tracker

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Pi

Never miss an important date again! This app helps you save and track anniversaries with custom reminders. It supports various time units and allows you to create your own event parameters for personalized tracking.

Highlights
  • Save and track anniversaries
  • Customizable reminders
  • Support for various time units
  • Create custom event parameters
  • Track nerdy and significant events
Features
Read full description

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.

About

Anniversary Countdown Tracker

Features
Read full description

Anniversary Countdown Tracker turns the dates that matter — your wedding day, the day you met, a birthday, a quiet milestone — into a live count you can see at a glance: how many days until the next one, and how many days you have already shared. Most countdown apps treat every date the same. This one understands anniversaries. It knows your 25th is Silver and your next big one is Pearl, counts time together in real years, months and days (never days divided by 365), lands a Feb 29 anniversary on the right day, and repeats yearly so you enter a date once and never again. WHAT YOU GET • "612 days until your Silver anniversary" waiting on your Home Screen widget — no need to open the app • A running days-together counter: 9 years, 4 months, 11 days — 3,421 days in total • Reminders that actually arrive: a week before, a day before, the morning of — at the hour you choose • The traditional gift for every year — Paper, Wood, Silver, Gold — surfaced before you have to search for it • A plan for the day: dinner spot, gift idea and place saved with each date, plus a photo and a note • Share cards ready to post — "1,000 days together" as a clean image in two taps PERFECT FOR • Couples counting the days together since their first date • Spouses who never want to scramble the week before a wedding anniversary • Anyone keeping birthdays, memorials and family milestones in one calm place • Long-distance partners watching the count to the next reunion WHY NOT JUST USE THE CALENDAR? A calendar tells you a date exists. It does not count the days for you, does not know your 30th is Pearl, fires one alert you will swipe away, and puts your anniversary next to a dentist appointment. Here, every date gets a countdown, a memory and a reminder plan of its own. PRIVATE BY DEFAULT Your dates, notes and photos stay on your iPhone. No account, no cloud upload, no tracking. The widget shows only the short summary it needs. FULL ACCESS Anniversary Countdown Tracker requires Full Access: a weekly or yearly auto-renewing subscription, or a one-time lifetime purchase. Full Access unlocks unlimited events, the Home Screen widget, multi-date reminders, every share-card design and all event colours. Add your first date today — by tonight, the count is already on your Home Screen. Terms of Use: https://leanstudio.asia/terms-of-use Privacy Policy: https://leanstudio.asia/privacy-policy Support: support@leanstudio.asia

Screenshots

Pi4 screens
Anniversary Countdown Tracker4 screens

Verdict

The call

Pi and Anniversary Countdown Tracker are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Pi ships an update every 5 months, Anniversary Countdown Tracker every 4 months. The most recent releases landed on October 12, 2026 and September 25, 2026 respectively.

ScorecardNo meaningful differences
Pi versus Anniversary Countdown Tracker: the parameters behind the verdict, then further details
ParameterPiAnniversary Countdown Tracker
PriceFreeFree
Rating5.0 (2 ratings) — better—
Number of ratings2 — better—
Update frequencyEvery 5 monthsEvery 4 months — better
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhoneiPhone
Requires iOS16.6 — better17.0
Further details — not scored
Size4 MB4 MB
Age rating4+4+
DeveloperSestra StudioLEAN ASIA CO., LTD

In-app purchases

None

Pi

No in-app purchases

None

Anniversary Countdown Tracker

No in-app purchases

Questions

Is Pi free?
Pi is free to download, with no in-app purchases.
Is Anniversary Countdown Tracker free?
Anniversary Countdown Tracker is free to download, with no in-app purchases.
Do Pi or Anniversary Countdown Tracker have ads?
Neither Pi nor Anniversary Countdown Tracker shows ads.
Which is updated more often, Pi or Anniversary Countdown Tracker?
Pi ships an update every 5 months, and Anniversary Countdown Tracker every 4 months. Most recently, Pi was updated on October 12, 2026 and Anniversary Countdown Tracker on September 25, 2026.

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