# Markov Algorithm vs Meridian

The clearest difference is update cadence: Meridian at every 2 days against Markov Algorithm's every 5 weeks. Markov Algorithm's advantage is iOS requirement (15.0 vs 17.6). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Markov Algorithm sells 3 in-app purchases, starting at $3.99 per month and Meridian sells 2 in-app purchases, starting at $2.99 per 7 days. Whichever you choose, the download price is not the number that matters.

Markov Algorithm ships an update every 5 weeks, Meridian every 2 days. The most recent releases landed on October 3, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | Markov Algorithm | Meridian |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/markov-algorithm/id1427691412/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 5 weeks | **Every 2 days** |
| Monetization | Free with in-app purchases | — |
| Size | 8 MB | 9 MB |
| Requires iOS | **15.0** | 17.6 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Konstantin Mishukov](https://appshunter.io/developer/1164017853) | [Tony Onodi](https://appshunter.io/developer/1450754267) |

## What reviewers say

### Markov Algorithm

[App page](https://appshunter.io/ios/app/markov-algorithm/id1427691412)

This tool emulates a Markov Machine, a string rewriting system used in computer science. It helps students test and debug algorithms with grammar-like rules and a step-by-step execution log.

**Highlights:** Markov Machine emulator, String rewriting system, Grammar-like rule application, Step-by-step debugging, Execution log

**Features:** Family Sharing, Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium: Monthly | $3.99 | per month |
| Premium: Annual | $14.99 | per year |
| Lifetime access | $19.99 | one-time |


### Meridian

[App page](https://appshunter.io/ios/app/meridian-time-zone-clock/id6738972311)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Meridian Pro | $2.99 | per 7 days |
| Meridian Pro | $14.99 | per year |


## Frequently asked questions

### Is Markov Algorithm free?

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

### Is Meridian free?

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

### Do Markov Algorithm or Meridian have ads?

Neither Markov Algorithm nor Meridian shows ads.

### Which is updated more often, Markov Algorithm or Meridian?

Markov Algorithm ships an update every 5 weeks, and Meridian every 2 days. Most recently, Markov Algorithm was updated on October 3, 2026 and Meridian on October 1, 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.*