# Discrete Math vs Rizmi

The clearest difference is in-app purchases: Rizmi at none against Discrete Math's 3. Rizmi also leads on update cadence (weekly vs every 3 weeks). Discrete Math's advantage is iOS requirement (15.1 vs 17.0). On price, ads and device support there is nothing between them.

Both are free to download. Discrete Math sells 3 in-app purchases, starting at $4.99 per 7 days. Rizmi asks for nothing beyond the download.

Discrete Math ships an update every 3 weeks, Rizmi weekly. Both last shipped on October 25, 2026.

## The numbers

| Metric | Discrete Math | Rizmi |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[3.0 (2 ratings)](https://appshunter.io/ios/app/rizmi/id6778931425/reviews)** |
| Number of ratings | — | **2** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Weekly** |
| Monetization | — | Free |
| Size | 39 MB | 0 MB |
| Requires iOS | **15.1** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Mobin Akhter](https://appshunter.io/developer/1812505286) | [SAIDMAKHMUD MAKHKAMJONOV](https://appshunter.io/developer/6778931427) |

## What reviewers say

### Discrete Math

[App page](https://appshunter.io/ios/app/discrete-math-discretica/id6761345113)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Premium | $4.99 | per 7 days |
| Yearly Premium | $29.99 | per year |
| Lifetime Premium | $64.99 | one-time |


### Rizmi

[App page](https://appshunter.io/ios/app/rizmi/id6778931425)

This app transforms your handwritten math problems into step-by-step solutions. It provides clear explanations for each stage of the problem-solving process, making complex calculus and discrete math concepts more accessible.

**Highlights:** Handwritten math input, Step-by-step solutions, In-depth explanation of each step, Supports calculus and discrete math, Distraction-free interface

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

**In-app purchases:** none


## Frequently asked questions

### Is Discrete Math free?

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

### Is Rizmi free?

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

### Do Discrete Math or Rizmi have ads?

Neither Discrete Math nor Rizmi shows ads.

### Which is updated more often, Discrete Math or Rizmi?

Discrete Math ships an update every 3 weeks, and Rizmi weekly. Most recently, Discrete Math was updated on October 25, 2026 and Rizmi on October 25, 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.*