# Castle Bravo vs Do Not Reply

The clearest difference is in-app purchases: Castle Bravo at none against Do Not Reply's 4. Do Not Reply's advantage is ads (none vs shown) and update cadence (every 4 days vs every 2 weeks). On price, device support and iOS requirement there is nothing between them.

Both are free to download. Do Not Reply sells 4 one-off in-app purchases. Castle Bravo asks for nothing beyond the download.

Castle Bravo ships an update every 2 weeks, Do Not Reply every 4 days. The most recent releases landed on October 13, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | Castle Bravo | Do Not Reply |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 33.3% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 2 weeks | **Every 4 days** |
| Monetization | Ad-supported | — |
| Size | 15 MB | 48 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 12+ |
| Developer | [Blyts LLC](https://appshunter.io/developer/454180365) | [Fluently AI](https://appshunter.io/developer/1791172141) |

## What reviewers say

### Castle Bravo

[App page](https://appshunter.io/ios/app/castle-bravo/id6792818574)

Experience a conspiracy thriller where characters text you, send multimedia, and react to your free-form responses. This interactive story blends declassified nuclear test records with immersive fiction, allowing your conversations to shape the narrative and relationships.

**Highlights:** Interactive story told through messages, Open-ended responses for real conversations, Multimedia messages (voice, photos, files), Based on real declassified events, Build relationships through dialogue

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

**In-app purchases:** none


### Do Not Reply

[App page](https://appshunter.io/ios/app/do-not-reply/id6803724799)

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 50 Tokens | $0.99 | one-time |
| 150 Tokens | $2.49 | one-time |
| 2000 Tokens | $4.99 | one-time |
| 5000 Tokens | $9.99 | one-time |


## Frequently asked questions

### Is Castle Bravo free?

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

### Is Do Not Reply free?

Do Not Reply is free to download, with in-app purchases available.

### Do Castle Bravo or Do Not Reply have ads?

Castle Bravo shows ads; Do Not Reply does not.

### Which is updated more often, Castle Bravo or Do Not Reply?

Castle Bravo ships an update every 2 weeks, and Do Not Reply every 4 days. Most recently, Castle Bravo was updated on October 13, 2026 and Do Not Reply 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.*