Celebrera vs Kalc
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Celebrera
This app tracks your age in various units beyond just years, including weeks, days, hours, minutes, and seconds. It helps you remember and celebrate significant milestones and provides reminders for upcoming events. You can also share your celebrations on social media.
- Age tracking in multiple units
- Milestone celebration
- Event reminders
- Social media sharing
- Detailed age breakdown
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Why celebrate only birthdays? Celebrera keeps track of your age in all time units and helps you remember and celebrate milestones such as 1000 weeks, 10000 days, or one billion seconds. After setting you birthday, you'll have a constantly ticking clockwork that neatly displays your exact age in years, months, weeks, days, hours, minutes and seconds. In the Remind section you can monitor upcoming events and choose whether you want Celebrera to notify you shortly before these events so that you don't miss them. When the time comes, you're able to share the big moment with you friends on Facebook, Twitter or Weibo!
Kalc
This utility app offers a unit converter, calculator, and world clock. Its user-friendly interface is designed for quick access to everyday calculations and conversions.
- Unit converter
- Calculator
- World clock
- Simple UI
- Quick results
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Unit Converter, Calculator, and World Clock. The simple & clean UI to get the results you need for everyday use as quickly as possible.
Screenshots
Verdict
The clearest difference is review sentiment: Kalc at 96% against Celebrera's 0%. Kalc also leads on update cadence (every 9 days vs every 7 months) and ratings volume (3 vs 1). Celebrera's advantage is rating (5.0 vs 4.7) and iOS requirement (11.0 vs 13.4). On price, ads, in-app purchases and monetization model 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.
Celebrera holds the better App Store score, 5.0 against 4.7. Both are backed by a comparable volume of ratings — 1 and 3 respectively. Written reviews complicate that: 0% of Celebrera's written reviews are positive against 96% of Kalc's, so the app with the better star average is not the one people write more warmly about.
Celebrera ships an update every 7 months, Kalc every 9 days. Both last shipped on November 1, 2026.
| Parameter | Celebrera | Kalc |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) — better | 4.7 (3 ratings) |
| Positive reviews | 0.0% of reviews | 96.2% of reviews — better |
| Number of ratings | 1 | 3 — better |
| Update frequency | Every 7 months | Every 9 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 11.0 — better | 13.4 |
| Further details — not scored | ||
| Size | 4 MB | 24 MB |
| Age rating | 4+ | 4+ |
| Developer | ApplicVision | YUTA OKAJIMA |
Customer experience
Celebrera
Kalc
In-app purchases
Celebrera
No in-app purchases
Kalc
No in-app purchases
