# MindMark AI vs Arch Calendar

The clearest difference is review sentiment: MindMark AI at 100% against Arch Calendar's 77%. Arch Calendar's advantage is iOS requirement (16.4 vs 18.5). On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. MindMark AI sells 2 in-app purchases, starting at $9.99 per month and Arch Calendar sells 2 in-app purchases, starting at $6.00 per month. Whichever you choose, the download price is not the number that matters.

MindMark AI ships an update every 4 days, Arch Calendar every 8 days. The most recent releases landed on September 9, 2026 and September 23, 2026 respectively.

## The numbers

| Metric | MindMark AI | Arch Calendar |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/mindmark-ai-second-brain/id6749483055/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | **100.0% of reviews** | 76.9% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 4 days** | Every 8 days |
| Monetization | Free | Free |
| Size | 25 MB | 95 MB |
| Requires iOS | 18.5 | **16.4** |
| Devices | iPhone | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Nir Portiansky](https://appshunter.io/developer/1828915914) | [MOBA Incorporated](https://appshunter.io/developer/1823577996) |

## What reviewers say

### MindMark AI

[App page](https://appshunter.io/ios/app/mindmark-ai-second-brain/id6749483055)

Capture, organize, and instantly find information from various sources. This AI-powered tool automatically summarizes content and uses smart search to retrieve anything you need. Collaborate with others through shared folders for seamless idea exchange.

**Highlights:** Instant capture of links, text, and screenshots, AI-generated summaries and insights, Smart search by keyword, concept, or context, Automatic tagging and collection organization, Collaborative shared folders, Private and secure data storage

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| MindMark Pro - Monthly | $9.99 | per month |
| MindMark Pro - Yearly | $69.99 | per year |


### Arch Calendar

[App page](https://appshunter.io/ios/app/arch-calendar-time-blocking/id6753331558)

This minimal calendar app combines an inbox for tasks and ideas with a planning calendar. Seamlessly capture thoughts and drag them onto time blocks to organize your day and enhance focus.

**Highlights:** Quick task and idea capture, Drag-and-drop time blocking, Organize work by Smart Spaces, Unified inbox and calendar, Minimalist interface

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Plan | $6.00 | per month |
| Yearly Plan | $48.00 | per year |


## Frequently asked questions

### Is MindMark AI free?

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

### Is Arch Calendar free?

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

### Do MindMark AI or Arch Calendar have ads?

Neither MindMark AI nor Arch Calendar shows ads.

### Which is updated more often, MindMark AI or Arch Calendar?

MindMark AI ships an update every 4 days, and Arch Calendar every 8 days. Most recently, MindMark AI was updated on September 9, 2026 and Arch Calendar on September 23, 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.*