Ello vs Marble
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Ello
An AI-powered tutor designed for children aged 5-9 to improve reading and math skills. It actively listens and provides real-time feedback as children read aloud and solve math problems. Features include personalized learning paths and interactive story creation.
- AI-powered reading and math tutoring
- Real-time audio feedback
- Personalized learning levels
- Interactive story creation
- Parent dashboard
- Support for up to 4 children
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Ello is an AI tutor for reading and math, ages 5 to 9 (Kinder to 3rd grade). Your child reads and talks out loud. Ello listens to every word and teaches in the moment. Start free. The Free plan includes daily lessons, and your first week of Ello Unlimited is on us. No credit card. 88% of children read more with Ello.* Named one of TIME's Best Inventions. Rated by Common Sense Media. Featured on Good Morning America. HOW ELLO TEACHES • It listens. When your child stumbles on a word, Ello hears it and helps them sound it out instead of saying the word for them. • It talks back. After a story, Ello asks what happened, listens to the answer, and responds to what your child said. • It explains math. Ello talks through each step out loud, from counting to multiplication, and lets your child find the answer. • It starts at your child's level. Ello places your child in reading and math, and you can change the level anytime in Settings. CREATE A STORY Your child makes up a story. Ello turns it into a real book with pictures, then teaches them to read it. BUILT FOR FAMILIES • Up to 4 children on one account, each with their own level, stars, and books. • A parent dashboard with lessons completed, words read, and stars earned. • Texts that share the funny, sweet things your child says to Ello. • No ads. BUILT BY TEACHERS Thirty-seven teachers and learning researchers built Ello. WHAT PARENTS SAY "My son is shy about attempting to read out loud with me, but he loves reading out loud with Ello!" (App Store review) "It's actually engaging with my son and listening to what he says and correcting and encouraging him." (App Store review) PLANS • Free: daily reading and math lessons, shared by every child on the account. • Ello Unlimited: unlimited learning for every child and full parent reports. Optional subscription, billed monthly or yearly. • Every family gets Ello Unlimited free for their first 7 days. *Survey of Ello families. Questions? support@ello.com
Marble
An interactive world designed to spark children's curiosity into learning through exploration, quests, and problem-solving. It adapts to their interests and learning levels, offering engaging challenges and real-world activity ideas.
- Interactive learning worlds
- Adaptive quests and challenges
- Parental progress reports
- Real-world activity suggestions
- COPPA compliant
- Designed for ages 6-12
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Marble is an interactive world that turns your kid's curiosity into learning. And it never feels like school. They explore worlds, take on quests, make things, solve problems and follow their questions wherever they lead: dinosaurs, space, drawing, music, storms, machines. Marble listens and adapts, so every adventure is built around what your kid cares about. (WHAT YOUR KID GETS) - A living world that grows with their interests and adapts to their level. No passive feed to scroll. - Quests where they build, create, and figure things out - A guide that never runs out of patience for the 677th "why?" question - Challenges that teach them to get stuck, try again, and win (WHAT YOU GET) - A daily note on what they explored and what they're learning - One connected map of their curiosity( skills, interests, breakthroughs) based on the US and UK curriculum standards - Ideas for real-world activities to keep the spark going off-screen - Valuable, active screen time. No passive mindless watching. (BUILT FOR CHILDHOOD) - Designed for kids ages 6–12 - No ads. No algorithmic feed. - COPPA compliant: parents create every account, we don't sell data, and you can review or delete your kid's information anytime - Made by parents who believe technology should be worthy of childhood (BETA) We're building Marble with our community. Join us to give us feedback and help us make Marble great for kids around the world. Questions? Ideas? Your kid would want to ride a whale to reach the next island? We read everything: support@withmarble.com
Screenshots
Verdict
The clearest difference is review sentiment: Ello at 88% against Marble's 57%. Ello also leads on chart position (#75 vs unranked) and iOS requirement (15.0 vs 26.0). Marble's advantage is monetization model (free vs freemium). On price, update cadence, ads and in-app purchases 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.
Ello ships an update every 2 days, Marble every 3 days. The most recent releases landed on November 8, 2026 and November 10, 2026 respectively.
| Parameter | Ello | Marble |
|---|---|---|
| Price | Free | Free |
| Rating | 4.7 (245 ratings) — better | — |
| Positive reviews | 87.9% of reviews — better | 57.1% of reviews |
| Number of ratings | 245 — better | — |
| Update frequency | Every 2 days — better | Every 3 days |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Freemium | Free — better |
| Best chart rank | #75 — better | — |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 15.0 — better | 26.0 |
| Further details — not scored | ||
| Size | 208 MB | 849 MB |
| Age rating | 4+ | 4+ |
| Developer | Ello Technology, Inc. | Generative Spark Inc |
Customer experience
Ello
Marble
In-app purchases
Ello
No in-app purchases
Marble
No in-app purchases









