# MDA800 OPTICAL vs Chroniton

The clearest difference is update cadence: MDA800 OPTICAL at every 10 months against Chroniton's every 38 months. MDA800 OPTICAL also leads on iOS requirement (9.0 vs 16.4). 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.

MDA800 OPTICAL ships an update every 10 months, Chroniton every 38 months. The most recent releases landed on October 10, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | MDA800 OPTICAL | Chroniton |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 10 months** | Every 38 months |
| Monetization | — | Free |
| Size | 6 MB | 2 MB |
| Requires iOS | **9.0** | 16.4 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [杏生 卢](https://appshunter.io/developer/1094592555) | [Driftwood Studio Software LLC](https://appshunter.io/developer/1822849713) |

## What reviewers say

### MDA800 OPTICAL

[App page](https://appshunter.io/ios/app/mda800-optical/id1562553359)

**Features:** macOS Compatibility

**In-app purchases:** none


### Chroniton

[App page](https://appshunter.io/ios/app/chroniton/id1572325897)

This app helps you track important dates and recurring events, providing reminders for future tasks. It's useful for managing everything from car maintenance and household chores to personal milestones and pet care.

**Highlights:** Event and date tracking, Customizable categories, Next due date reminders, Photo and note attachments, One-tap date updates, Email event sharing, iCloud sync

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is MDA800 OPTICAL free?

MDA800 OPTICAL is free to download, with no in-app purchases.

### Is Chroniton free?

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

### Do MDA800 OPTICAL or Chroniton have ads?

Neither MDA800 OPTICAL nor Chroniton shows ads.

### Which is updated more often, MDA800 OPTICAL or Chroniton?

MDA800 OPTICAL ships an update every 10 months, and Chroniton every 38 months. Most recently, MDA800 OPTICAL was updated on October 10, 2026 and Chroniton on October 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.*