# SOS Security vs Memo AI

The clearest difference is in-app purchases: SOS Security at none against Memo AI's 3. SOS Security also leads on iOS requirement (16 vs 18.3). Memo AI's advantage is update cadence (monthly vs every 18 months). On price, ads and device support there is nothing between them.

Both are free to download. Memo AI sells 3 in-app purchases, starting at $5.99 per 7 days. SOS Security asks for nothing beyond the download.

SOS Security ships an update every 18 months, Memo AI monthly. The most recent releases landed on October 27, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | SOS Security | Memo AI |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.9 (70 ratings)](https://appshunter.io/ios/app/memo-ai-voice-notes-taker/id6757826242/reviews)** |
| Number of ratings | — | **70** |
| Positive reviews | — | 89.5% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 18 months | **Monthly** |
| Monetization | — | Freemium |
| Size | 197 MB | 71 MB |
| Requires iOS | **16** | 18.3 |
| Devices | iPhone, iPad, iPod | iPhone, Mac, Apple Watch |
| Age rating | 17+ | 4+ |
| Developer | [Manolo Milian](https://appshunter.io/developer/1686540764) | [NotePlan LLC](https://appshunter.io/developer/1137020763) |

## What reviewers say

### SOS Security

[App page](https://appshunter.io/ios/app/sos-security/id6463294744)

**Features:** macOS Compatibility

**In-app purchases:** none


### Memo AI

[App page](https://appshunter.io/ios/app/memo-ai-voice-notes-taker/id6757826242)

Effortlessly capture and transcribe spoken ideas on the go. This app automatically structures your recordings into key points, action items, and formatted notes, with an AI chat feature to query your content.

**Highlights:** One-tap background recording, Transcription in 12+ languages, Customizable AI note formatting, AI chat for note querying, Action item extraction, Export to Markdown and PDF

**Features:** Apple Watch app, Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Premium | $5.99 | per 7 days |
| Monthly Premium | $12.99 | per month |
| Annual Premium | $79.99 | per year |


## Frequently asked questions

### Is SOS Security free?

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

### Is Memo AI free?

Memo AI is free to download, with in-app purchases available.

### Do SOS Security or Memo AI have ads?

Neither SOS Security nor Memo AI shows ads.

### Which is updated more often, SOS Security or Memo AI?

SOS Security ships an update every 18 months, and Memo AI monthly. Most recently, SOS Security was updated on October 27, 2026 and Memo AI on October 31, 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.*