StelaClock vs Simple Age Calculator
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
StelaClock
Discover the Mayan calendar and number system with this educational clock app. It displays the current time and date using Mayan glyphs and a Base 20 notation, offering a unique way to experience ancient Maya culture.
- Mayan calendar display
- Mayan number system
- Vigesimal (Base 20) notation
- Sophisticated calendar converter
- Mayan glyph numerals
- Daily use clock
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Explore the world of the Mayan calendar — and keep a beautiful day clock for everyday curiosity. StelaClock is a modern rebuild of the classic Mayan-inspired clock: a living Tzolk’in wheel for today, Long Count and Haab alongside it, and a Gregorian → Mayan date converter. Educational and contemplative — not fortune-telling. No account. No subscription. Everything runs on your iPhone. TODAY — YOUR LIVING CLOCK • See today’s day sign, tone, and glyph on a multi-ring Tzolk’in wheel • One-line energy for the day — gentle reflection, not a full reading engine • Current Cycles show Long Count place values (bak’tun · k’atun · tun) in progress • Day tones use classic bar-and-dot Mayan numerals • The highlighted kin (sign + tone) changes once per local calendar day at midnight • The gentle wheel spin is decorative only — hours and minutes do not advance the calendar CONVERT — ANY DATE • Pick a Gregorian date • Instant Tzolk’in (sign + tone), Haab, Long Count, and Calendar Round • Copy or Share results for notes, travel, or study • Convert historical dates too — including milestones such as the bak’tun completion of December 21, 2012 — as calendar history, not a live countdown EXPLORE — MOVE THROUGH THE CYCLE • Step day by day or jump ±13 (Wavespell) and ±260 (full Tzolk’in round) • Ring, timeline, and grid views of the same selected date • Optional Haab and Long Count labels, plus why the date matters (trecena, year bearer, night lord) PROFILES — LIGHT & LOCAL • Save up to 30 people with birth dates • Birth signature, upcoming alignment / return days, and optional mood history • Data stays on your device PRIVATE BY DESIGN • No login, no cloud account, no ads SDK • Optional daily reminder via Apple’s local notifications (you choose the time) • Themes: Mystic, Minimal, and Stone FOR LEARNING AND REFLECTION StelaClock uses classical Mayan calendar math (GMT correlation 584283). The Long Count uses the Maya’s modified base-20 (vigesimal) place values — shown as readable cycle fields, not a digital hours-and-minutes wall clock. Results can differ from other apps or traditions. Content is educational and entertainment — not medical, financial, legal, or professional advice, and not a substitute for living cultural teaching. Apple Watch and widgets are planned for a later update — not included in this release. Privacy Policy: https://mayanchart.com/privacy Terms of Use: https://mayanchart.com/terms Support: support@mayanchart.com
Simple Age Calculator
Instantly calculate a person's age in years by entering their date of birth. The app also features customizable icons to quickly identify if someone is 16, 18, 21, or older, making it ideal for age verification.
- Calculate age from date of birth
- Identify ages 16, 18, 21+
- Customizable age thresholds
- Quick age verification tool
- Supports iPhone and iPad
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Enter a person's date of birth and instantly see their age in years. Also with handy icons indicating if they are 16, 18, 21 or over. You can customise the three ages. Perfect for use in bars, tattoo parlours or anywhere else where it is essential to check a person's age. Made by sfyfe.com
Screenshots
Verdict
The clearest difference is rating: Simple Age Calculator at 5.0 against StelaClock's 4.6. Simple Age Calculator also leads on review sentiment (100% vs 86%) and price ($0.99 vs $3.99). StelaClock's advantage is ratings volume (5 vs 1). On update cadence, 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
StelaClock costs $3.99 and Simple Age Calculator $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Simple Age Calculator holds the better App Store score, 5.0 against 4.6. That said, the two scores are not equally well evidenced: StelaClock has 5 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 86% of StelaClock's written reviews are positive against 100% of Simple Age Calculator's.
StelaClock ships an update every 29 months, Simple Age Calculator every 22 months. The most recent releases landed on October 10, 2026 and October 8, 2026 respectively.
| Parameter | StelaClock | Simple Age Calculator |
|---|---|---|
| Price | $3.99 | $0.99 — better |
| Rating | 4.6 (5 ratings) | 5.0 (1 ratings) — better |
| Positive reviews | 85.7% of reviews | 100.0% of reviews — better |
| Number of ratings | 5 — better | 1 |
| Update frequency | Every 29 months | Every 22 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 26.0 | 17.5 — better |
| Further details — not scored | ||
| Size | 7 MB | 1 MB |
| Age rating | 4+ | 4+ |
| Developer | Gary Saggu | Scott Fyfe |
Customer experience
StelaClock
Simple Age Calculator
In-app purchases
StelaClock
No in-app purchases
Simple Age Calculator
No in-app purchases
Questions
Is StelaClock free?
Is Simple Age Calculator free?
Which has better reviews, StelaClock or Simple Age Calculator?
Do StelaClock or Simple Age Calculator have ads?
Which is updated more often, StelaClock or Simple Age Calculator?
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