# Card Adder 21 vs Adda29Offline

The clearest difference is in-app purchases: Adda29Offline at none against Card Adder 21's 1. Card Adder 21's advantage is update cadence (every 5 days vs every 2 weeks). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Card Adder 21 sells 1 one-off in-app purchase. Adda29Offline asks for nothing beyond the download.

Card Adder 21 ships an update every 5 days, Adda29Offline every 2 weeks. The most recent releases landed on October 9, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Card Adder 21 | Adda29Offline |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/card-adder-21/id6748666396/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 5 days** | Every 2 weeks |
| Monetization | Free | — |
| Size | 79 MB | 278 MB |
| Requires iOS | 13.0 | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Dot Business Integrated Solutions](https://appshunter.io/developer/1808206089) | [Rahul Kant Ravi](https://appshunter.io/developer/1884524010) |

## What reviewers say

### Card Adder 21

[App page](https://appshunter.io/ios/app/card-adder-21/id6748666396)

Enhance your mental math skills by tracking a running total as cards are dealt. Progress through increasingly challenging levels with a timed element. The game offers progress tracking and is designed to make counting enjoyable.

**Highlights:** Progressive difficulty levels, Timed challenges, Running total tracking, Progress tracking, Card dealing gameplay

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Card Adder 21 Pro Lifetime | $4.99 | one-time |


### Adda29Offline

[App page](https://appshunter.io/ios/app/adda29offline/id6760449388)

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

**In-app purchases:** none


## Frequently asked questions

### Is Card Adder 21 free?

Card Adder 21 is free to download, with in-app purchases available.

### Is Adda29Offline free?

Adda29Offline is free to download, with no in-app purchases.

### Do Card Adder 21 or Adda29Offline have ads?

Neither Card Adder 21 nor Adda29Offline shows ads.

### Which is updated more often, Card Adder 21 or Adda29Offline?

Card Adder 21 ships an update every 5 days, and Adda29Offline every 2 weeks. Most recently, Card Adder 21 was updated on October 9, 2026 and Adda29Offline on October 25, 2026.

---

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