# 4Quadrants vs ConcurReminder

The clearest difference is update cadence: 4Quadrants at every 6 days against ConcurReminder's every 4 weeks. ConcurReminder's advantage is iOS requirement (15.0 vs 26.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

4Quadrants ships an update every 6 days, ConcurReminder every 4 weeks. The most recent releases landed on September 17, 2026 and September 24, 2026 respectively.

## The numbers

| Metric | 4Quadrants | ConcurReminder |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 6 days** | Every 4 weeks |
| Size | 6 MB | 26 MB |
| Requires iOS | 26.0 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [颢宸 唐](https://appshunter.io/developer/1875716414) | [Braveyo LLC](https://appshunter.io/developer/1855102831) |

## What reviewers say

### 4Quadrants

[App page](https://appshunter.io/ios/app/4quadrants/id6758995394)

**Features:** macOS Compatibility

**In-app purchases:** none


### ConcurReminder

[App page](https://appshunter.io/ios/app/concurreminder/id6789254014)

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

**In-app purchases:** none


## Frequently asked questions

### Is 4Quadrants free?

4Quadrants is free to download, with no in-app purchases.

### Is ConcurReminder free?

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

### Do 4Quadrants or ConcurReminder have ads?

Neither 4Quadrants nor ConcurReminder shows ads.

### Which is updated more often, 4Quadrants or ConcurReminder?

4Quadrants ships an update every 6 days, and ConcurReminder every 4 weeks. Most recently, 4Quadrants was updated on September 17, 2026 and ConcurReminder on September 24, 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.*