Comparison

Keep Up Pong vs String Theory Game

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

Head to head
About

Keep Up Pong

Control a paddle with your finger to keep a ball in play. Aim to beat your high score and climb the leaderboards. This simple yet challenging game offers endless replayability.

Highlights
  • Touch and drag paddle control
  • Beat your high score
  • Climb the leaderboard
  • Simple, challenging gameplay
  • Supports iPhone and iPad
Read full description

Simple but Challenging! • Touch the Paddle to take control of it • Drag your finger to move it around • Your device is now your Paddle • Keep your Paddle flat • Move your Paddle upwards to hit the ball • Hit the ball again! • And again! • Keep it going • Yep • Beat your high score • Reach the top of the leaderboard • Be the best • I believe in you For iPad Users • Lock your Rotation in Settings or Control Centre to prevent the app from rotating during play • Make sure to select the Orientation of the device in the Orientation Screen to ensure the gyro directions are correct

About

String Theory Game

A vibrant puzzle game where you recreate patterns by drawing loops between pegs. Strategically place and overlap loops to match the target design with minimal moves. Offers handcrafted puzzles, daily challenges, and endless free play.

Highlights
  • Pattern matching puzzles
  • Loop drawing mechanics
  • Color-based loop filling
  • 60+ handcrafted puzzles
  • Daily challenges
  • Free play modes
Features
Read full description

String Theory is a colorful puzzle game about matching a given pattern by building it out of different colored shapes. String theory has 60+ handcrafted puzzles, daily challenges, and free play modes, making for hours of fun. Draw lines between pegs to create loops. The loops fill in with a different color depending on how many pegs they touch. Any loop that touches either three pegs or six pegs turns green. Any loop that touches either four pegs or eight pegs turns purple. Any loop that touches either five pegs or seven pegs turns spotted purple. Replicating the given pattern with as few loops as possible requires strategic placement and overlapping of loops. With dozens of handcrafted patterns to match, and thousands additional free play patterns, String Theory is a mind-bending game filled to the brim with tricky puzzles to get the gears turning! No ads, no microtransactions.

Screenshots

Keep Up Pong4 screens
String Theory Game4 screens

Verdict

The call

The clearest difference is in-app purchases: String Theory Game at none against Keep Up Pong's 1. String Theory Game also leads on ads (none vs shown) and update cadence (every 2 days vs every 34 months). On price and device support 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

Both are free to download. Keep Up Pong sells 1 one-off in-app purchase. String Theory Game asks for nothing beyond the download.

UpkeepUpdate frequency

Keep Up Pong ships an update every 34 months, String Theory Game every 2 days. The most recent releases landed on October 14, 2026 and October 9, 2026 respectively.

Scorecard5 real differences · 5 level
Keep Up Pong versus String Theory Game: the parameters behind the verdict, then further details
ParameterKeep Up PongString Theory Game
PriceFreeFree
Rating—5.0 (2 ratings) — better
Positive reviews0.0% of reviews—
Number of ratings—2 — better
Update frequencyEvery 34 monthsEvery 2 days — better
AdsYesNo — better
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.010.0 — better
Further details — not scored
Size149 MB43 MB
Age rating4+4+
DeveloperMatt AtkinsonAndrew Viesta

Customer experience

Keep Up Pong

Written reviews1 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

String Theory Game

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

1 purchases

Keep Up Pong

One-time1
  • Remove Adverts$0.99
None

String Theory Game

No in-app purchases

Questions

Is Keep Up Pong free?
Keep Up Pong is free to download, with in-app purchases available.
Is String Theory Game free?
String Theory Game is free to download, with no in-app purchases.
Do Keep Up Pong or String Theory Game have ads?
Keep Up Pong shows ads; String Theory Game does not.
Which is updated more often, Keep Up Pong or String Theory Game?
Keep Up Pong ships an update every 34 months, and String Theory Game every 2 days. Most recently, Keep Up Pong was updated on October 14, 2026 and String Theory Game on October 9, 2026.

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