# Cactus vs Oops! AI Memory Assistant

The clearest difference is update cadence: Oops! AI Memory Assistant at every 2 days against Cactus's weekly. Oops! AI Memory Assistant also leads on iOS requirement (15.1 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 Oops! AI Memory Assistant sells 5 in-app purchases, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.

Cactus ships an update weekly, Oops! AI Memory Assistant every 2 days. The most recent releases landed on July 24, 2026 and September 9, 2026 respectively.

## The numbers

| Metric | Cactus | Oops! AI Memory Assistant |
| --- | --- | --- |
| 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 days** |
| Monetization | Freemium | — |
| Size | 2 MB | 53 MB |
| Requires iOS | 17.0 | **15.1** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Feidong Song](https://appshunter.io/developer/1792424713) | [Necati Bora Gurel](https://appshunter.io/developer/1846389609) |

## 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 |


### Oops! AI Memory Assistant

[App page](https://appshunter.io/ios/app/oops-ai-memory-assistant/id6754039339)

**Features:** macOS Compatibility

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Starter | $0.99 | per month |
| Regular | $3.99 | per month |
| Power | $6.99 | per month |
| Heavy | $12.99 | per month |
| +50 interactions | $0.99 | one-time |


## Frequently asked questions

### Is Cactus free?

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

### Is Oops! AI Memory Assistant free?

Oops! AI Memory Assistant is free to download, with in-app purchases available.

### Do Cactus or Oops! AI Memory Assistant have ads?

Neither Cactus nor Oops! AI Memory Assistant shows ads.

### Which is updated more often, Cactus or Oops! AI Memory Assistant?

Cactus ships an update weekly, and Oops! AI Memory Assistant every 2 days. Most recently, Cactus was updated on July 24, 2026 and Oops! AI Memory Assistant on September 9, 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.*