Comparison

Number Run vs Stack the States® 2

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

Head to head
About

Number Run

Embark on an adventure to recover stolen crystals by solving math problems. This game offers engaging practice for all ages, from children learning arithmetic to adults seeking mental stimulation. It features multiple game modes and educational alignment.

Highlights
  • 52 math levels
  • Addition, subtraction, multiplication, division
  • Endless Mode
  • Common Core aligned
  • Unlockable outfits
  • Developed by graduate students
Features
Read full description

Baron von Count has stolen the 4 Mathemagical crystals of the land. Chase him down and bring him to justice or humanity will be forced to count on their fingers forever! Number Run is great practice for boys & girls learning math and adults who just want to stay sharp. Finally, a FUN math game: -Features 52 levels across addition, subtraction, multiplication, and division -Test your skills in Endless Mode -Aligned to Common Core state standards -Unlock new outfits and show your style -Developed by graduate students from Stanford and USC -Retina support for iPhone and iPad -Did we mention it's actually fun? We're gamers, we're developers, we're educators--talk to us at www.facebook.com/numberrun

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/

Screenshots

Number Run4 screens
Stack the States® 24 screens

Verdict

The call

The clearest difference is monetization model: Number Run at free against Stack the States® 2's paid. Number Run also leads on update cadence (every 3 months vs every 9 months). Stack the States® 2's advantage is chart position (#22 vs unranked). On price, rating, review sentiment and ratings volume 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

Number Run costs $2.99 and Stack the States® 2 $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.5 for Number Run against 4.5 for Stack the States® 2. Both are backed by a comparable volume of ratings — 1.1K and 1.1K respectively. Written reviews are what separate them: 91% of Number Run's written reviews are positive against 86% of Stack the States® 2's.

UpkeepUpdate frequency

Number Run ships an update every 3 months, Stack the States® 2 every 9 months. The most recent releases landed on September 28, 2026 and September 29, 2026 respectively.

Scorecard3 real differences · 8 level
Number Run versus Stack the States® 2: the parameters behind the verdict, then further details
ParameterNumber RunStack the States® 2
Price$2.99$2.99
Rating4.5 (1.1K ratings)4.5 (1.1K ratings)
Positive reviews90.9% of reviews — better86.0% of reviews
Number of ratings1.1K1.1K — better
Update frequencyEvery 3 months — betterEvery 9 months
AdsNoNo
In-app purchasesNoNo
MonetizationFree — betterPaid
Best chart rank—#22 — better
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS12.012.0
Further details — not scored
Size39 MB140 MB
Age rating4+4+
DeveloperIgnacio SchiefelbeinFreecloud Design, Inc.

Customer experience

Number Run

All ratings1,111 ratings
Positive88.3%
Neutral5.2%
Negative6.5%
Written reviews88 reviews
Positive90.9%
Neutral3.4%
Negative5.7%

Stack the States® 2

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

Bugs and requests

Number Run

Reported bugs

2 issues
  • Occasional crashes or freezes
  • Issues with number entry on certain devices

Requested features

3 requests
  • Ability to adjust difficulty/speed settings
  • Progress tracking for parents/teachers
  • More variety of skins/characters

Stack the States® 2

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

Number Run

No in-app purchases

None

Stack the States® 2

No in-app purchases

Questions

Is Number Run free?
Number Run costs $2.99, with no in-app purchases.
Is Stack the States® 2 free?
Stack the States® 2 costs $2.99, with no in-app purchases.
Which has better reviews, Number Run or Stack the States® 2?
Number Run and Stack the States® 2 are both rated 4.5 out of 5 on the App Store, from 1.1K and 1.1K ratings respectively.
Do Number Run or Stack the States® 2 have ads?
Neither Number Run nor Stack the States® 2 shows ads.
Which is updated more often, Number Run or Stack the States® 2?
Number Run ships an update every 3 months, and Stack the States® 2 every 9 months. Most recently, Number Run was updated on September 28, 2026 and Stack the States® 2 on September 29, 2026.

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