Spark vs Birth Sky
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Spark
Engage your mind with daily puzzles that make learning fun. Explore diverse topics like history, mythology, and geography through interactive games. Discover fascinating facts and sharpen your cognitive skills with expertly crafted challenges.
- Daily learning puzzles
- Diverse topic exploration
- Five unique game modes
- Expert-crafted content
- Progress tracking
- "Aha" moment design
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Sharpen your mind with games that help you learn. Spark brings fascinating topics to life with thoughtful puzzles spanning ancient history, mythology, movies, food, geography, and more. With five unique games, Spark makes learning part of your routine. Each game offers a different way to explore a topic, and every one teaches you as you play. Spark’s games include: This or That: Choose between two options to learn more about each topic Links: Find the common thread connecting people, places, and ideas Chrono: Put events in order to see how history really unfolded Knockout: Uncover surprising comparisons in a series of fun head-to-head matchups Hindsight: Pinpoint when and where a photo was taken to uncover the story behind it All of Spark’s puzzles are crafted by experts, not AI, and designed to spark those “aha” moments that make ideas stick. Explore hundreds of topics, from ancient history to the animal kingdom. Along the way, you’ll uncover facts that are fun to learn and even better to share. From the creators of Elevate and Balance, Spark is part of a collection of mental fitness apps designed to strengthen your mind. For additional information, please read our Terms of Service (https://themindcompany.com/terms-and-conditions?from=spark) and Privacy Policy (https://themindcompany.com/privacy-policy?from=spark).
Birth Sky
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Every sky exists only once. Because Earth, the stars, and the planets are constantly in motion, no view of the night sky ever repeats. You were born under a sky that had never existed before and will never exist again. That makes it a fingerprint over your head. Birth Sky calculates what your sky looked like the moment you were born. It shows the real stars and planets as they stood at that instant, and finds the catalogued star closest to directly over your head: your zenith star. Then it tells you its story. Not astrology. A personal connection to real astronomy. :: How it works :: 1. Enter your date, time, and place of birth 2. Watch your birth sky being revealed 3. Explore your sky map and read your story 4. Save or share it :: Scientifically accurate :: Built on real astronomical calculations, not symbolic charts or interpretations. • True star positions, corrected for precession • Visible planets and their positions • Moon phase, illumination, and position • Historical time zones, reconstructed accurately All calculations run on your device. Birth Sky uses the same sources professional astronomers rely on: the Hipparcos star catalogue from the European Space Agency, the VSOP87 planetary theory, the ELP2000 lunar theory, and the official IAU constellation boundaries. :: A sky you can explore :: • A circular sky map centered on your zenith • Optional constellation lines and names • Planet markers and Moon phase • Pinch to zoom in and explore every corner of your sky • Beautiful constellation artwork Designed to feel calm and timeless. :: Personal insights :: • Your zenith star, chosen from a catalog of 9,000 stars • The constellation that star is part of • Your birth Moon: phase, illumination, and lunar age • The planets visible at that moment • Whether you arrived by day, night, or twilight :: Share your sky :: • Social media ready video • High resolution image at any zoom level • A meaningful gift for birthdays, newborns, and anniversaries :: Perfect for :: • Anyone curious about the sky they were born under • New parents capturing their baby's first sky • Birthdays, anniversaries, and once in a lifetime moments • Lovers of astronomy, history, and the cosmos Birth Sky is not about prediction or personality traits. It is about precision, identity, and wonder. The sky you were born under, finally revealed.
Screenshots
Verdict
The clearest difference is price: Spark at Free against Birth Sky's $6.99. Spark also leads on chart position (#93 vs unranked) and iOS requirement (16.0 vs 26.0). Birth Sky's advantage is in-app purchases (none vs 10) and ads (none vs shown). On device support 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
Spark is free to download; Birth Sky costs $6.99 up front. Spark sells 9 in-app purchases, starting at $2.99 per month. Birth Sky asks for nothing beyond the download.
Spark ships an update weekly, Birth Sky daily. The most recent releases landed on November 13, 2026 and November 9, 2026 respectively.
| Parameter | Spark | Birth Sky |
|---|---|---|
| Price | Free — better | $6.99 |
| Rating | 4.7 (2.8K ratings) — better | — |
| Positive reviews | 92.5% of reviews | — |
| Number of ratings | 2.8K — better | — |
| Update frequency | Weekly | Daily — better |
| Ads | Yes | No — better |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | — |
| Best chart rank | #93 — better | — |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 16.0 — better | 26.0 |
| Further details — not scored | ||
| Size | 151 MB | 17 MB |
| Age rating | 4+ | 4+ |
| Developer | The Mind Company | Adventuring B.V. |
Bugs and requests
Spark
Reported bugs
1 issue- AT&T blocking the website as potentially malicious
Requested features
2 requests- More games and puzzles
- Dark mode option
Birth Sky
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Spark
- Spark+$2.991 Month
- Spark+$4.991 Month
- Spark+$7.491 Month
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- Spark+1 Year trial2 variants$39.991 Year
- Spark+7 Days trial$39.991 Year
- Spark+3 Days trial$39.991 Year
- Spark+7 Days trial$59.991 Year
- Spark+1 Year trial$59.991 Year
- Spark+7 Days trial$79.991 Year
Birth Sky
No in-app purchases









