# Tazkirr vs Calculus Solver

The clearest difference is in-app purchases: Tazkirr at none against Calculus Solver's 2. Tazkirr also leads on update cadence (every 5 months vs every 11 months) and iOS requirement (15.1 vs 17.6). On price, ads and device support there is nothing between them.

Both are free to download. Calculus Solver sells 2 in-app purchases, starting at $4.99 per 7 days. Tazkirr asks for nothing beyond the download.

Tazkirr ships an update every 5 months, Calculus Solver every 11 months. The most recent releases landed on October 9, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | Tazkirr | Calculus Solver |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 5 months** | Every 11 months |
| Size | 59 MB | 12 MB |
| Requires iOS | **15.1** | 17.6 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Abdullah Isa](https://appshunter.io/developer/1696493219) | [Nicolas Gustavo Melian](https://appshunter.io/developer/1777868675) |

## What reviewers say

### Tazkirr

[App page](https://appshunter.io/ios/app/tazkirr/id6744072168)

**Features:** macOS Compatibility

**In-app purchases:** none


### Calculus Solver

[App page](https://appshunter.io/ios/app/calculus-solver-step-by-step/id6753817856)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Plan | $4.99 | per 7 days |
| Yearly Plan | $24.99 | per year |


## Frequently asked questions

### Is Tazkirr free?

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

### Is Calculus Solver free?

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

### Do Tazkirr or Calculus Solver have ads?

Neither Tazkirr nor Calculus Solver shows ads.

### Which is updated more often, Tazkirr or Calculus Solver?

Tazkirr ships an update every 5 months, and Calculus Solver every 11 months. Most recently, Tazkirr was updated on October 9, 2026 and Calculus Solver on October 6, 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.*