Spark vs Science Libs
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Spark
Engage with daily learning puzzles centered around a single theme. Explore history, science, and pop culture through four unique, human-crafted games designed for discovery and fun.
- Daily themed puzzles
- Four unique game modes
- Human-crafted puzzles
- Explore history, science, and pop culture
- Archive of past puzzles
- No timers or tests
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Replace doomscrolling with learning. Each day, Spark explores a single theme through thoughtful puzzles spanning ancient history, mythology, movies, food, geography, and more. With five unique games and new puzzles every day, Spark makes learning part of your routine. Each game offers a different way to explore the day's theme, and each one teaches you as you play. Spark's games include: This or That: Choose between two options to learn more about the day's theme 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 in the Library, from ancient history to the animal kingdom, with past themes to revisit anytime. 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).
Science Libs
This app makes learning science fun for kids aged 6-12 through Mad Libs-style stories. Children fill in blanks to create hilarious tales, then read engaging articles explaining the real science. It encourages vocabulary, creativity, and curiosity in a safe, ad-free environment.
- Mad Libs-style science stories
- Vocabulary and creativity building
- Engaging science articles
- Reflective questions for discussion
- Kid-friendly design
- Optional social sharing with parental controls
- Ad-free environment
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Science Libs: Laugh, Learn, Grow Science Libs combines the silly fun of classic Mad Libs with an educational twist that helps kids ages 6–12 build vocabulary, creativity, and curiosity while learning science. Kids fill in the blanks with their own words to create hilarious stories focused on science topics, then discover a short, engaging article that explains the real science in a way they can understand. It’s more than just laughs—each Science Lib ends with age-appropriate thought-provoking questions that invite reflection and conversation, turning screen time into meaningful learning moments. Features: ~ Playful, kid-friendly design with bright colors and clear fonts. ~ Eight categories of Mad Lib–style activities focused on learning science. ~ Stories that encourage creativity and language skills. ~ Short educational articles after each activity for deeper learning. ~ Reflective questions to spark curiosity and discussion. ~ Safe, ad-free environment designed for kids and families. ~ Language filters to ensure a kid-friendly space with no direct messaging between users. ~ Perfect for car rides, classroom enrichment, or cozy evenings, Science Libs makes learning an adventure—one laugh at a time. NEW! ~ Optional social sharing section where kids can read and rate other kids' Science Libs with parent-approved access. Parents can set a password so kids can only browse shared stories together, adding an extra layer of safety. Science Libs is designed to help your child laugh, learn, and grow in a safe, ad-free environment while exploring science. You remain in control of sharing features, and we are committed to protecting your child’s privacy and experience. Science Libs – Parent FAQ How do you protect my child’s data?We collect only the minimum data necessary to operate the app, such as device type and nicknames. We do not sell personal data, and parents can request data deletion at any time or use the in-app delete button. Do you show ads in the app?No, Science Libs does not display ads. Is there a cost to use the app?Science Libs offers a free core experience for your child to enjoy, with optional themed Science Lib packs available as one-time purchases. Can other users contact my child?No. Users can only rate shared Science Libs. There is no commenting or messaging within the app. How can I delete my child’s data or account?You can easily use the in-app delete account button at any time. Is it safe for my child to share their Science Libs?Yes. Sharing is optional, and your child can choose which Science Libs to share. Shared stories display only the text and your child’s chosen nickname, not personal information. Can I control whether my child can view or share Science Libs?Yes. You can lock the sharing and browsing sections behind a parent password so your child cannot access or view shared stories without your permission. What if someone shares something inappropriate?We use automated filters and manual review to keep Science Libs a safe space. If you see something inappropriate, you can report it using the in-app report button, and we will review and remove any content that violates our guidelines. Can I review or delete what my child has shared?Yes. You can request review or deletion of your child’s shared Science Libs at any time, or you or your child can remove their submissions directly within the app. Do you recommend products in the app?Sometimes, we may recommend age-appropriate books and games we believe add value to your child’s learning experience, but we only suggest products we genuinely trust. Science Libs is designed to help your child laugh, learn, and grow in a safe, ad-free environment while exploring science and creativity, giving parents control while supporting a fun, educational experience.
Screenshots
Verdict
The clearest difference is ads: Science Libs at none against Spark's shown. Science Libs also leads on rating (5.0 vs 4.8) and iOS requirement (13.4 vs 16.0). Spark's advantage is ratings volume (2.7K vs 2) and chart position (#160 vs unranked). On price, update cadence, 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. Spark sells 10 in-app purchases, starting at $2.99 per month and Science Libs sells 4 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.
Science Libs holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: Spark has 2.7K ratings behind it against 2, so its average is the more settled of the two.
Spark ships an update weekly, Science Libs every 9 days. The most recent releases landed on September 25, 2026 and September 18, 2026 respectively.
| Parameter | Spark | Science Libs |
|---|---|---|
| Price | Free | Free |
| Rating | 4.8 (2.7K ratings) | 5.0 (2 ratings) — better |
| Positive reviews | 92.7% of reviews | — |
| Number of ratings | 2.7K — better | 2 |
| Update frequency | Weekly — better | Every 9 days |
| Ads | Yes | No — better |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Best chart rank | #160 — better | — |
| Devices | iPhone, iPad | iPhone, iPod |
| Requires iOS | 16.0 | 13.4 — better |
| Further details — not scored | ||
| Size | 145 MB | 41 MB |
| Age rating | 4+ | 4+ |
| Developer | The Mind Company | Aaran Solh |
Customer experience
Spark
Science Libs
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
Science Libs
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Spark
- Spark Plus$2.991 Month
- Spark Plus$4.991 Month
- Spark+$9.991 Month
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- Spark+1 Year trial$39.991 Year
- Spark Plus1 Year trial4 variants$39.991 Year
- Spark Plus7 Days trial$39.991 Year
- Spark Plus3 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
Science Libs
- Purchase all Science Libs$2.99
- Workbook download$2.99
- Category Purchase$4.99
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- Purchase Four Categories$9.99









