# Signal Lost vs SONAR Deep Dive

The clearest difference is in-app purchases: SONAR Deep Dive at none against Signal Lost's 3. SONAR Deep Dive also leads on update cadence (every 2 days vs every 2 weeks) and iOS requirement (13.0 vs 17.0). Signal Lost's advantage is ads (none vs shown). On price and device support there is nothing between them.

Both are free to download. Signal Lost sells 3 one-off in-app purchases. SONAR Deep Dive asks for nothing beyond the download.

Signal Lost ships an update every 2 weeks, SONAR Deep Dive every 2 days. The most recent releases landed on November 10, 2026 and November 6, 2026 respectively.

## The numbers

| Metric | Signal Lost | SONAR Deep Dive |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/signal-lost-survive/id6773804306/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | Every 2 weeks | **Every 2 days** |
| Monetization | Free | — |
| Size | 2 MB | 145 MB |
| Requires iOS | 17.0 | **13.0** |
| Devices | iPhone | **iPhone, iPod** |
| Age rating | 12+ | 4+ |
| Developer | [Thomas Masters](https://appshunter.io/developer/6773804308) | [博 郑](https://appshunter.io/developer/6788115634) |

## What reviewers say

### Signal Lost

[App page](https://appshunter.io/ios/app/signal-lost-survive/id6773804306)

A narrative survival game where you listen to a radio to make choices. Decipher broadcasts to find allies and uncover the truth behind a global event. Your decisions have lasting consequences.

**Highlights:** Real-time narrative pacing, 13 distinct characters, Branching narrative choices, In-game journal, AI-generated live responses, Hidden mechanics

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| A Cup of Coffee | $0.99 | one-time |
| A Fresh Battery | $2.99 | one-time |
| A New Antenna | $4.99 | one-time |


### SONAR Deep Dive

[App page](https://appshunter.io/ios/app/sonar-deep-dive/id6798673505)

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

**In-app purchases:** none


## Frequently asked questions

### Is Signal Lost free?

Signal Lost is free to download, with in-app purchases available.

### Is SONAR Deep Dive free?

SONAR Deep Dive is free to download, with no in-app purchases.

### Do Signal Lost or SONAR Deep Dive have ads?

SONAR Deep Dive shows ads; Signal Lost does not.

### Which is updated more often, Signal Lost or SONAR Deep Dive?

Signal Lost ships an update every 2 weeks, and SONAR Deep Dive every 2 days. Most recently, Signal Lost was updated on November 10, 2026 and SONAR Deep Dive 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.*