Comparison

Simple Machines by Tinybop vs Slice Fractions 2

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Simple Machines by Tinybop

Explore the playful side of physics and learn about simple machines through interactive experiments. Kids can discover how levers, pulleys, and other mechanisms work by building and testing them in a digital sandbox environment. This app is designed to spark curiosity and understanding of scientific principles.

Highlights
  • Explore 6 simple machines
  • Experiment with real-world physics
  • Investigate physics at work
  • Learn about force and motion
  • Kid-friendly design
  • Interactive labels in 40+ languages
Features
Read full description

Explore the playful side of physics! “I just love how apps like these get kids genuinely excited about science." — COOL MOM TECH Experiment with levers, pulleys, inclined planes, inclined planes, wedges, wheel and axles, and screws. Discover how they work and investigate the invisible forces behind them in this sandbox app. Destroy a castle, make music, send satellites into orbit & more! *** App Store Editor's Choice *** *** Parents’ Choice Gold Award winner *** Simple Machines integrates with STEM curriculum: kids can alter and test each machine to learn about force and motion, actions and reactions, inputs and outputs, conservation of energy, mechanical advantages, and tradeoffs. Get free activity sheets at tinybop.com. Simple Machines is No. 4 in Tinybop’s Explorer’s Library series, designed for curious kids ages 4+ to dive deep into big ideas. The apps in this series have won Best of the App Store, App Store Editors’ Choice, Parents’ Choice, and Children's Technology Review Editor’s Choice awards. Features: * Explore 6 simple machines: levers, pulleys, inclined planes, wedges, wheel and axles, and screws. * Experiment with real world physics, actions and reactions, inputs and outputs. Learn about force and motion. * Investigate the physics at work behind each machine. * Sophisticated sound design rewards experimentation. * Original artwork by James Gilleard. * Smart features use your device’s camera to bring your kids’ world into the app. * Learn new vocabulary in 40+ languages with interactive labels. * Intuitive, safe, and kid-friendly design. * Entertaining for kids and adults alike. FREE handbook Our expert-reviewed handbook is full of facts, interaction hints, and discussion questions to support learning in this app, in the classroom or at home. Download in your app or at: http://tinybop.com/handbooks. Privacy Policy We take your and your child’s privacy very seriously. We do not collect or share personal information about your child, nor do we allow any third-party advertising. When the camera, microphone, and other services are used within an app, your information is neither collected nor distributed outside of the app. Read our complete privacy policy at tinybop.com. Tinybop, Inc. is a Brooklyn-based studio of designers, engineers, and artists. We make toys for tomorrow. We’re all over the internet. Visit us: www.tinybop.com Follow us: twitter.com/tinybop Like us: facebook.com/tinybop Peek behind the scenes: instagram.com/tinybop We love hearing your stories! If you have ideas, or something isn’t working as you expect it to, please contact us: hi@tinybop.com. Compatible with iPhone 5, 5s, 5c, 6, 6 Plus, iPod touch (5th generation), iPad 2, 3, mini, and Air. **This app is optimized for iPad 2 and iPhone 5 or higher. Requires iOS 7.0 or later. psst! It's not Tiny Bop, or Tiny Bob, or Tiny Pop. It's Tinybop.

About

Slice Fractions 2

Embark on a journey to recover a stolen hat by solving over 100 physics-based fraction puzzles. This game introduces fraction concepts visually and interactively, with new creatures and challenges.

Highlights
  • Learn fraction concepts without words
  • Over 100 unique physics puzzles
  • 3 colorful worlds
  • Collect friendly pets
  • Safe digital environment
Features
Read full description

The sequel to the acclaimed and multi award-winning game Slice Fractions - Best of 2014 and Editor’s choice of the Apple Store. Help Mammoth get his stolen hat back with the support of new creatures that move, multiply and reveal hidden fractions. Embark on a surprising journey in this puzzle game designed for children 6-12-year-old. FEATURES • Learn fraction concepts without words • Experience an activity designed with researchers at a Canadian university (UQAM) • Solve over 100 unique physics puzzles in 3 colorful worlds • Find and collect friendly pets that follow you in your adventure • Play in a safe, digital environment: no ads or in-app purchases LEARNING METHODS • A UQAM study has shown the original Slice Fractions significantly improved students performances by +10,5% on the standard test “Trends in International Mathematics and Science Study” (TIMSS) after only 3 hours of gameplay • An approach based on visual representations and manipulatives that improves kids’ conceptual understanding of fractions FRACTION CONCEPTS • Part-whole partitioning • Numerator / Denominator notation • Equivalent fractions • Fraction multiplication • Finding the common denominator • Fractions bigger than 1 TEACHERS Slice Fractions 2 is based on the following Common Core concepts: (2.G.A.2) (2.G.A.3) (3.NF.A.1) (3.NF.A.3) (4.NF.A.1) (4.NF.B.3) (4.NF.B.4) (5.NF.A.1) (5.NF.B.3). Slice Fractions and Slice Fractions 2 are complementary and cover different learning concepts inspired by the Common Core. No preliminary knowledge of fractions is required. For the complete learning experience get the Slice Fractions Bundle. ULULAB We produce fun and pedagogically sound video games. We strive to ensure that these games are intuitive and will lead to profound conceptual learning. We believe we can push the limits of game-based learning. FOLLOW US • Website: www.ululab.com • Twitter: www.twitter.com/Ululab • Facebook: www.facebook.com/Ululab • Newsletter: www.ululab.com/newsletter Your feedback is much appreciated, so please feel free to provide suggestions for future updates. If something isn't working as you would expect, please contact us: www.ululab.com/contact

Screenshots

Simple Machines by Tinybop4 screens
Slice Fractions 24 screens

Verdict

The call

The clearest difference is review sentiment: Slice Fractions 2 at 95% against Simple Machines by Tinybop's 37%. Slice Fractions 2 also leads on rating (4.7 vs 3.7) and ratings volume (1.2K vs 62). Simple Machines by Tinybop's advantage is price ($2.99 vs $3.99). 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

CostPrice · In-app purchases · Ads · Monetization

Simple Machines by Tinybop costs $2.99 and Slice Fractions 2 $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Slice Fractions 2 holds the better App Store score, 4.7 against 3.7. That said, the two scores are not equally well evidenced: Slice Fractions 2 has 1.2K ratings behind it against 62, so its average is the more settled of the two. Written reviews point the same way: 37% of Simple Machines by Tinybop's written reviews are positive against 95% of Slice Fractions 2's.

UpkeepUpdate frequency

Simple Machines by Tinybop ships an update every 4 months, Slice Fractions 2 every 2 months. Both last shipped on November 11, 2026.

Scorecard5 real differences · 5 level
Simple Machines by Tinybop versus Slice Fractions 2: the parameters behind the verdict, then further details
ParameterSimple Machines by TinybopSlice Fractions 2
Price$2.99 — better$3.99
Rating3.7 (62 ratings)4.7 (1.2K ratings) — better
Positive reviews37.4% of reviews95.3% of reviews — better
Number of ratings621.2K — better
Update frequencyEvery 4 monthsEvery 2 months — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS12.08.0 — better
Further details — not scored
Size112 MB381 MB
Age rating4+4+
DeveloperTinybop Inc.Ululab

Customer experience

Simple Machines by Tinybop

All ratings62 ratings
Positive62.9%
Neutral14.5%
Negative22.6%
Written reviews131 reviews
Positive37.4%
Neutral8.4%
Negative54.2%

Slice Fractions 2

All ratings1,238 ratings
Positive93.5%
Neutral3.3%
Negative3.2%
Written reviews150 reviews
Positive95.3%
Neutral2.0%
Negative2.7%

User reviews

Simple Machines by Tinybop

From 62 App Store ratings

What we love

  • 🎨 Beautiful graphics and design
  • 🧠 Educational and informative
  • 👨‍👩‍👧‍👦 Good for kids and learning
  • 💡 Sparks curiosity and imagination
  • 👍 Intuitive and easy to use

Room to improve

  • 😴 Boring and repetitive
  • 💸 Expensive for limited content
  • 🤷‍♂️ Lacks clear goals or objectives
  • 🤏 Limited interaction and content
  • 🚫 Not a game, more of a toy

Slice Fractions 2

From 1.2K App Store ratings

What we love

  • 👍 Fun and educational
  • 🤩 Engaging and intuitive
  • 🎨 Cute and creative visuals
  • 💡 Helps learn fractions
  • 🧠 Promotes problem-solving

Room to improve

  • 🐛 Occasional crashes or bugs
  • 🤔 Some levels too challenging
  • 🕰️ Could use more content/levels

Bugs and requests

Simple Machines by Tinybop

Reported bugs

8 issues
  • Crashes immediately on launch
  • Cannot install after purchase
  • App crashes after loading screen
  • No sound
  • Does not work
Show 3 more
  • Download issues
  • Does not open
  • Chinese language not displayed

Requested features

8 requests
  • Add a creative building mode
  • More levels and modules
  • Sandbox mode
  • Ability to build own machines
  • More interactive elements
Show 3 more
  • Add more complex mechanisms
  • Improve wheel and axle interaction
  • Allow bringing up planets in pulley game

Slice Fractions 2

Reported bugs

2 issues
  • Level 19 reported as impossible
  • Crash on Multiplication level 33

Requested features

3 requests
  • More math concepts beyond fractions
  • Ability to track progress/achievements
  • Multiplayer or collaborative mode

In-app purchases

None

Simple Machines by Tinybop

No in-app purchases

None

Slice Fractions 2

No in-app purchases

Questions

Is Simple Machines by Tinybop free?
Simple Machines by Tinybop costs $2.99, with no in-app purchases.
Is Slice Fractions 2 free?
Slice Fractions 2 costs $3.99, with no in-app purchases.
Which has better reviews, Simple Machines by Tinybop or Slice Fractions 2?
Slice Fractions 2 is rated higher. Simple Machines by Tinybop averages 3.7 out of 5 from 62 ratings, while Slice Fractions 2 averages 4.7 from 1.2K ratings.
Do Simple Machines by Tinybop or Slice Fractions 2 have ads?
Neither Simple Machines by Tinybop nor Slice Fractions 2 shows ads.
Which is updated more often, Simple Machines by Tinybop or Slice Fractions 2?
Simple Machines by Tinybop ships an update every 4 months, and Slice Fractions 2 every 2 months. Most recently, Simple Machines by Tinybop was updated on November 11, 2026 and Slice Fractions 2 on November 11, 2026.

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