# String.io vs Ammo Run

The clearest difference is review sentiment: Ammo Run at 100% against String.io's 58%. Ammo Run also leads on in-app purchases (none vs 4) and iOS requirement (12.0 vs 15.0). On price, update cadence, ads 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. Ammo Run asks for nothing beyond the download.

String.io ships an update every 3 months, Ammo Run every 5 months. The most recent releases landed on October 24, 2026 and October 19, 2026 respectively.

## The numbers

| Metric | String.io | Ammo Run |
| --- | --- | --- |
| 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 | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | Yes | Yes |
| Update frequency | **Every 3 months** | Every 5 months |
| Monetization | Subscription | **Ad-supported** |
| Size | 339 MB | 85 MB |
| Requires iOS | 15.0 | **12.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 12+ |
| Developer | [Metajoy](https://appshunter.io/developer/1436156282) | [Christopher Wright](https://appshunter.io/developer/1535371208) |

## 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


### Ammo Run

[App page](https://appshunter.io/ios/app/ammo-run/id1585515345)

Defend your core in this endless wave tower defense game by keeping your turrets loaded with ammunition. Survive against increasing enemy waves, earn upgrades, and seal blast doors to enhance your survival chances. Enjoy fast-paced action across three difficulty levels and compare your performance on Game Center leaderboards.

**Highlights:** Endless wave tower defense gameplay, Ammunition management for turrets, Enemy wave survival, Upgrade system, Blast door sealing, Three difficulty levels, Game Center leaderboards

**In-app purchases:** none


## Frequently asked questions

### Is String.io free?

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

### Is Ammo Run free?

Ammo Run is free to download, with no in-app purchases.

### Do String.io or Ammo Run have ads?

Both String.io and Ammo Run show ads.

### Which is updated more often, String.io or Ammo Run?

String.io ships an update every 3 months, and Ammo Run every 5 months. Most recently, String.io was updated on October 24, 2026 and Ammo Run on October 19, 2026.

---

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