# String.io vs Upward Bound

The clearest difference is in-app purchases: Upward Bound at none against String.io's 4. Upward Bound also leads on ads (none vs shown) and iOS requirement (13.0 vs 15.0). On price and device support there is nothing between them.

Both are free to download. String.io sells 4 in-app purchases, starting at $7.99 per 7 days. Upward Bound asks for nothing beyond the download.

## The numbers

| Metric | String.io | Upward Bound |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (1.8K ratings)](https://appshunter.io/ios/app/stringio/id1243426580/reviews)** | — |
| Number of ratings | **1.8K** | — |
| Positive reviews | 58.4% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 3 months | — |
| Monetization | Subscription | — |
| Size | 339 MB | 3 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Metajoy](https://appshunter.io/developer/1436156282) | [Systemores LLC](https://appshunter.io/developer/1889317813) |

## What reviewers say

### String.io

[App page](https://appshunter.io/ios/app/stringio/id1243426580)

Capture territory by enclosing areas with your string. Attack opponents by hitting their tails. Unlock avatars and enjoy minimalist graphics in this competitive .io game.

**Highlights:** Enclose areas to capture territory, Attack players by hitting tails, Unlock over 30 avatars, Minimalist graphics, Multiple control methods

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Subscribe For 1 Week | $7.99 | per 7 days |
| Subscribe For 1 Month | $19.99 | per month |
| Subscribe For 1 Year | $99.99 | per year |
| Remove Ads | $1.99 | one-time |

**What reviewers like**

- 🚀 Fast and addictive gameplay
- 👍 Variety of skins and characters
- 💡 Creative game concept
- 🎨 Colorful and visually appealing

**What reviewers complain about**

- 🔍 Opponents are AI, not real players
- 💰 Expensive in-app purchases for skins
- 📢 Excessive ads and ad interruptions
- 🐛 Occasional crashes and glitches

**Reported bugs**

- Game freezes at 24% loading
- Missions not registering as completed
- Inconsistent collision detection

**Requested features**

- Online multiplayer mode
- Ability to play with friends
- More levels and game modes
- Improved mission system


### Upward Bound

[App page](https://appshunter.io/ios/app/upward-bound-endless-climb/id6777684963)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is String.io free?

String.io is free to download, with in-app purchases available.

### Is Upward Bound free?

Upward Bound is free to download, with no in-app purchases.

### Do String.io or Upward Bound have ads?

String.io shows ads; Upward Bound does not.

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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.*