# Keep Up Pong vs String Theory Game

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.

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

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.

## The numbers

| Metric | Keep Up Pong | String Theory Game |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (2 ratings)](https://appshunter.io/ios/app/string-theory-game/id6479223958/reviews)** |
| Number of ratings | — | **2** |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 34 months | **Every 2 days** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 149 MB | 43 MB |
| Requires iOS | 15.0 | **10.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Matt Atkinson](https://appshunter.io/developer/1451978616) | [Andrew Viesta](https://appshunter.io/developer/1735241726) |

## What reviewers say

### Keep Up Pong

[App page](https://appshunter.io/ios/app/keep-up-pong/id1495070693)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Adverts | $0.99 | one-time |


### String Theory Game

[App page](https://appshunter.io/ios/app/string-theory-game/id6479223958)

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:** macOS Compatibility

**In-app purchases:** none


## Frequently asked 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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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*