Comparison

Stack the States® 2 vs NumberSlam®

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

Head to head
About

Stack the States® 2

Learn US geography by stacking animated states to win levels. Collect all 50 states to unlock bonus games and explore an interactive 3D map with detailed information about capitals, cities, and landmarks. Designed for fun and educational play for all ages.

Highlights
  • Interactive 3D map
  • Learn state capitals, cities, shapes, landmarks, and flags
  • Collect all 50 states
  • Unlock bonus games (Map It, Connect 2, Capital Tap)
  • Voice mode for independent play
  • Hundreds of unique questions
  • Multiple player profiles
Features
Currently charting
Read full description

Watch the states come to life as you learn US geography! Stack the States® is back and better than ever with new question types, new bonus games, voice mode, 3D graphics and a detailed interactive map! As you learn state capitals, cities, shapes, landmarks, flags and more, you can actually touch, move and drop the animated states anywhere on the screen. Carefully build a stack of states that reaches the checkered line to win each level. You earn a new state for every successfully completed level. All of your states appear on your own personalized map of the United States. Try to collect all 50! As you earn more states, you begin to unlock the free bonus games: Map It, Connect 2 and Capital Tap. Four games in one! What’s new in Stack the States® 2: - New question types - New bonus games: Connect 2 and Capital Tap - New voice mode that helps non-readers play independently - Brand new interactive map featuring major cities and a 3D elevation view of each state - Beautiful 3D graphics - 10 different 3D scenes depicting various locations in the US - 3D models of over 90 US landmarks Plus, all the great features that you loved from the original Stack the States®: - 50 flash cards — one for each state - Hundreds of unique questions - Up to six player profiles - A personalized map of the US - Fun sound effects and music - Works on both iPhone and iPad - a universal app Stack the States® 2 is an educational app for all ages that's actually FUN to play. Try it now and enjoy four games for the price of one! PRIVACY DISCLOSURE Stack the States® 2: - Does not contain 3rd party ads. - Does not contain in-app purchases. - Does not contain integration with social networks. - Does not use 3rd party analytics / data collection tools. - Does include links to apps by Dan Russell-Pinson in the iTunes App Store (via Performance Horizon). For more information on our privacy policy please visit: http://dan-russell-pinson.com/privacy/

About

NumberSlam®

This is a fast-paced mental math game designed to enhance your calculation skills on mobile. It's a digital adaptation of a popular classroom game, offering an engaging way to practice math for fun or improvement. The game is ad-free and tracks no user data for a safe, distraction-free experience.

Highlights
  • Improves mental math skills
  • Engaging and fast-paced gameplay
  • Digital remake of a popular classroom game
  • Ad-free experience
  • Tracking-free for user privacy
  • Suitable for practice or fun
Features
Read full description

Finally, an engaging, exciting, and fast-paced mental math skills game. NumberSlam® was created to improve your mental math skills on a mobile device. NumberSlam® is a digital remake of the popular math game “Board Slam” played in Classical Conversations Communities’ classrooms around the world. Whether playing for fun or practice, NumberSlam® is THE mental math game for you. Perfect for CC students, their parents or anyone that enjoys a good mental math challenge. NumberSlam® is Ad-Free & tracking-free so that your game-play is safe and free from distractions. We hope you like it, now Get Slamming!

Screenshots

Stack the States® 24 screens
NumberSlam®4 screens

Verdict

The call

The clearest difference is price: NumberSlam® at Free against Stack the States® 2's $2.99. NumberSlam® also leads on rating (5.0 vs 4.5) and update cadence (every 6 days vs every 9 months). Stack the States® 2's advantage is in-app purchases (none vs 1) and ratings volume (1.1K vs 7). On ads, device support and iOS requirement 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

NumberSlam® is free to download; Stack the States® 2 costs $2.99 up front. NumberSlam® sells 1 one-off in-app purchase. Stack the States® 2 asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

NumberSlam® holds the better App Store score, 5.0 against 4.5. That said, the two scores are not equally well evidenced: Stack the States® 2 has 1.1K ratings behind it against 7, so its average is the more settled of the two. Written reviews point the same way: 86% of Stack the States® 2's written reviews are positive against 100% of NumberSlam®'s.

UpkeepUpdate frequency

Stack the States® 2 ships an update every 9 months, NumberSlam® every 6 days. The most recent releases landed on September 24, 2026 and June 1, 2026 respectively.

Scorecard8 real differences · 3 level
Stack the States® 2 versus NumberSlam®: the parameters behind the verdict, then further details
ParameterStack the States® 2NumberSlam®
Price$2.99Free — better
Rating4.5 (1.1K ratings)5.0 (7 ratings) — better
Positive reviews86.0% of reviews100.0% of reviews — better
Number of ratings1.1K — better7
Update frequencyEvery 9 monthsEvery 6 days — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationPaidFree — better
Best chart rank#29 — better—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS12.0 — better13.0
Further details — not scored
Size140 MB31 MB
Age rating4+4+
DeveloperFreecloud Design, Inc.PIRUX, LLC

Customer experience

Stack the States® 2

All ratings1,135 ratings
Positive87.3%
Neutral4.5%
Negative8.2%
Written reviews136 reviews
Positive86.0%
Neutral7.4%
Negative6.6%

NumberSlam®

All ratings7 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews4 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Stack the States® 2

No in-app purchases

1 purchases

NumberSlam®

One-time1
  • Activate NumberSlam$7.99

Questions

Is Stack the States® 2 free?
Stack the States® 2 costs $2.99, with no in-app purchases.
Is NumberSlam® free?
NumberSlam® is free to download, with in-app purchases available.
Which has better reviews, Stack the States® 2 or NumberSlam®?
NumberSlam® is rated higher. Stack the States® 2 averages 4.5 out of 5 from 1.1K ratings, while NumberSlam® averages 5.0 from 7 ratings.
Do Stack the States® 2 or NumberSlam® have ads?
Neither Stack the States® 2 nor NumberSlam® shows ads.
Which is updated more often, Stack the States® 2 or NumberSlam®?
Stack the States® 2 ships an update every 9 months, and NumberSlam® every 6 days. Most recently, Stack the States® 2 was updated on September 24, 2026 and NumberSlam® on June 1, 2026.

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