# ACM interactions vs Learn Bulgarian Lang

The clearest difference is in-app purchases: ACM interactions at none against Learn Bulgarian Lang's 1. ACM interactions also leads on iOS requirement (10.2 vs 15.1). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Learn Bulgarian Lang sells 1 one-off in-app purchase. ACM interactions asks for nothing beyond the download.

ACM interactions ships an update every 14 months, Learn Bulgarian Lang every 16 months. The most recent releases landed on October 15, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | ACM interactions | Learn Bulgarian Lang |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/learn-bulgarian-lang/id6448949164/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 14 months** | Every 16 months |
| Monetization | — | Free |
| Size | 21 MB | 36 MB |
| Requires iOS | **10.2** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Association for Computing Machinery](https://appshunter.io/developer/405041865) | [Ghumman Tech LLC](https://appshunter.io/developer/1671347750) |

## What reviewers say

### ACM interactions

[App page](https://appshunter.io/ios/app/acm-interactions/id615463454)

**Features:** macOS Compatibility

**In-app purchases:** none


### Learn Bulgarian Lang

[App page](https://appshunter.io/ios/app/learn-bulgarian-lang/id6448949164)

Master Bulgarian conversation with this comprehensive language learning app. It offers audio functionality, quizzes, and personalized flashcards to help you achieve fluency quickly. Supports a vast array of native languages for a personalized learning experience.

**Highlights:** Supports numerous native languages, Text-to-speech audio functionality, Interactive quizzes, Study mode with flashcards, Progress tracking, Customizable flashcards with audio/images

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock All Features | $9.99 | one-time |


## Frequently asked questions

### Is ACM interactions free?

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

### Is Learn Bulgarian Lang free?

Learn Bulgarian Lang is free to download, with in-app purchases available.

### Do ACM interactions or Learn Bulgarian Lang have ads?

Neither ACM interactions nor Learn Bulgarian Lang shows ads.

### Which is updated more often, ACM interactions or Learn Bulgarian Lang?

ACM interactions ships an update every 14 months, and Learn Bulgarian Lang every 16 months. Most recently, ACM interactions was updated on October 15, 2026 and Learn Bulgarian Lang on October 7, 2026.

---

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