# Backpack Attack vs Pi Math

The clearest difference is ads: Pi Math at none against Backpack Attack's shown. Backpack Attack's advantage is iOS requirement (13.0 vs 15.0). On price, update cadence, in-app purchases and device support there is nothing between them.

Both are free to download. Backpack Attack sells 10 one-off in-app purchases and Pi Math sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Backpack Attack ships an update every 4 days, Pi Math every 5 days. The most recent releases landed on October 30, 2026 and November 6, 2026 respectively.

## The numbers

| Metric | Backpack Attack | Pi Math |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (155 ratings)](https://appshunter.io/ios/app/backpack-attack/id6714474754/reviews)** | — |
| Number of ratings | **155** | — |
| Positive reviews | 17.4% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | **Every 4 days** | Every 5 days |
| Monetization | Free with in-app purchases | — |
| Size | 226 MB | 58 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Tran Hai Dang](https://appshunter.io/developer/1770275611) | [IVOI TECHNOLOGY AND COMMUNICATION INVESTMENT JOINT STOCK COMPANY](https://appshunter.io/developer/6778327287) |

## What reviewers say

### Backpack Attack

[App page](https://appshunter.io/ios/app/backpack-attack/id6714474754)

Engage in an action-packed adventure blending run-and-gun combat with strategic weapon crafting and merging. Organize your backpack, evolve your arsenal, and conquer challenging levels to become the ultimate weapon master.

**Highlights:** Efficient backpack item arrangement, Weapon crafting and evolution, Strategic merging mechanics, Level progression and boss battles, Weapon upgrades and skill enhancement, Diverse and challenging levels

**Features:** macOS Compatibility

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Small Gem | $0.99 | one-time |
| Remove Force Ads | $2.99 | one-time |
| Starter Pack | $4.99 | one-time |
| Special Attack | $4.99 | one-time |
| Commander Pack | $6.99 | one-time |
| X2 Game Speed | $7.99 | one-time |
| Super Promotion Pack | $8.99 | one-time |
| Special Packs | $9.99 | one-time |
| Remove All Ads | $9.99 | one-time |
| Remove All Ads | $14.99 | one-time |

**What reviewers like**

- 👍 Awesome game
- 👍 Game good
- 👍 Character, Weapon, Theme Ok
- 👍 Fun game

**What reviewers complain about**

-  광고 Too many ads
- 💸 Scam for removing ads
- 🐛 Game freezes when unlocking characters
- 🐛 Ads not removed after purchase
- 🐛 In-game ads disrupt gameplay

**Reported bugs**

- Game freezes when unlocking second character
- Purchased ad removal not working
- Purchased items not delivered
- Character unlock progress stuck
- Game lag caused by ads

**Requested features**

- Fix character unlock bug
- Improve ad frequency
- More engaging storyline/lore
- Better weapon/inventory management


### Pi Math

[App page](https://appshunter.io/ios/app/pi-math-times-tables-games/id6806183224)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads Forever | $0.99 | one-time |


## Frequently asked questions

### Is Backpack Attack free?

Backpack Attack is free to download, with in-app purchases available.

### Is Pi Math free?

Pi Math is free to download, with in-app purchases available.

### Do Backpack Attack or Pi Math have ads?

Backpack Attack shows ads; Pi Math does not.

### Which is updated more often, Backpack Attack or Pi Math?

Backpack Attack ships an update every 4 days, and Pi Math every 5 days. Most recently, Backpack Attack was updated on October 30, 2026 and Pi Math on November 6, 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.*