# Cactus vs LostInNotes

The clearest difference is update cadence: Cactus at weekly against LostInNotes's every 2 weeks. LostInNotes's advantage is iOS requirement (15.0 vs 17.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Cactus sells 1 in-app purchase, starting at $4.99 per month and LostInNotes sells 1 in-app purchase, starting at $10.00 per month. Whichever you choose, the download price is not the number that matters.

Cactus ships an update weekly, LostInNotes every 2 weeks. The most recent releases landed on July 24, 2026 and September 15, 2026 respectively.

## The numbers

| Metric | Cactus | LostInNotes |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/cactus-ai-memory-sidekick/id6748361695/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Weekly** | Every 2 weeks |
| Monetization | Freemium | — |
| Size | 2 MB | 50 MB |
| Requires iOS | 17.0 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Feidong Song](https://appshunter.io/developer/1792424713) | [Metisora](https://appshunter.io/developer/1878534727) |

## What reviewers say

### Cactus

[App page](https://appshunter.io/ios/app/cactus-ai-memory-sidekick/id6748361695)

An AI-powered assistant designed to help you manage your day, capture ideas, and organize tasks. It offers natural language interaction, voice input, and secure cloud synchronization for seamless productivity.

**Highlights:** AI-powered assistant, Natural language interaction, Voice capture for ideas, Task organization, Schedule management, Secure cloud sync

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium plan. | $4.99 | per month |


### LostInNotes

[App page](https://appshunter.io/ios/app/lostinnotes/id6759413132)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Insight: AI Second Brain | $10.00 | per month |


## Frequently asked questions

### Is Cactus free?

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

### Is LostInNotes free?

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

### Do Cactus or LostInNotes have ads?

Neither Cactus nor LostInNotes shows ads.

### Which is updated more often, Cactus or LostInNotes?

Cactus ships an update weekly, and LostInNotes every 2 weeks. Most recently, Cactus was updated on July 24, 2026 and LostInNotes on September 15, 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.*