Life & fun · alternatives · 2026

24 alternatives to Size Up!

A simple and amazingly challenging concept game

Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. Size Up! launched in 2015; newer entries below may have overtaken it.

1. 1
   Steps!▲58

   One of the hardest Android/iOS games ever!

   2016 · its alternatives →

2. 2
   Rotate or Fail▲61

   The simplest-hardest game

   2016 · its alternatives →

3. 3
   circleup▲56

   Simple to play. Hard to master.

   2016 · its alternatives →

4. 4
   Matching Images▲68

   Are You Smarter Than a 6th Grader? Prove it NOW!

   2015 · its alternatives →

5. 5
   Game On Project▲62

   Customized Game Recommendations

   2015 · its alternatives →

6. 6
   20 Questions▲73

   The world's favorite guessing game!

   2016 · its alternatives →

7. 7
   Mathster▲62

   Math workout game

   2016 · its alternatives →

8. 8
   Zoom In▲71

   Close-up pic quiz

   2016 · its alternatives →

9. 9
   Puzzlepops!▲59

   A minimalist game of lollipops and logic

   2016 · its alternatives →

10. 10
    Push Out▲67

    Arcade game

    2016 · its alternatives →

11. 11
    Dollaring▲70

    Build an empire

    2015 · its alternatives →

12. 12
    Mini Metro for Mobile▲73

    A minimalistic subway layout game

    2016 · its alternatives →

13. 13
    Threes!▲95

    A tiny puzzle that grows on you

    2014 · its alternatives →

14. 14
    Breaout ball▲61

    eruo

    2016 · its alternatives →

15. 15
    Mathematics+▲78

    Your source for daily math workouts!

    2016 · its alternatives →

16. 16
    NUM▲109

    Insanely Hard Math Game

    2014 · its alternatives →

17. 17
    Candidate▲81

    A Q&A game to meet new people

    2015 · its alternatives →

18. 18
    none*2▲87

    A mysterious game of riddles, episode2

    2015 · its alternatives →

19. 19
    Rack Up▲58

    One-touch arcade puzzle game

    2016 · its alternatives →

20. 20
    Lift▲69

    Challenge your Reflexes and Score High

    2016 · its alternatives →

21. 21
    appANDdown▲54

    Very simple yet engaging puzzle game

    2016 · its alternatives →

22. 22
    Kids Fight▲62

    Simple stupid 1 or 2 player android game

    2017 · its alternatives →

23. 23
    Tunnel Flight▲57

    A minimalist android game

    2016 · its alternatives →

24. 24
    Check It! - Memory Challenge▲55

    Hardest memory game ever created.

    2016 · its alternatives →

Ranked by how close each launch is in meaning, then by votes. Prices were read from each product’s own site when checked and can change. Refine with your own description →