# Parametric Factorization vs Attestator

The clearest difference is in-app purchases: Attestator at none against Parametric Factorization's 8. Attestator also leads on update cadence (every 6 days vs fortnightly). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Parametric Factorization sells 8 one-off in-app purchases. Attestator asks for nothing beyond the download.

Parametric Factorization ships an update fortnightly, Attestator every 6 days. The most recent releases landed on September 14, 2026 and September 19, 2026 respectively.

## The numbers

| Metric | Parametric Factorization | Attestator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[2.9 (8 ratings)](https://appshunter.io/ios/app/parametric-factorization/id1493935902/reviews)** | — |
| Number of ratings | **8** | — |
| Positive reviews | 40.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Fortnightly | **Every 6 days** |
| Monetization | Free with in-app purchases | — |
| Size | 179 MB | 46 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Glindemann, Sennoun, Langer GbR](https://appshunter.io/developer/1024972809) | [Anton Ovchinnikov](https://appshunter.io/developer/1696578667) |

## What reviewers say

### Parametric Factorization

[App page](https://appshunter.io/ios/app/parametric-factorization/id1493935902)

This application helps users factor quadratic trinomials by entering three variables. It provides detailed solution steps and stores all calculations in a history for easy access and sharing. Supports positive and negative numbers, as well as decimals.

**Highlights:** Factors quadratic trinomials, Detailed solution steps, Input history, Supports decimals and negative numbers, Shareable solutions, Ad removal option

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

**In-app purchases (8)**

| Purchase | Price | Billing |
| --- | --- | --- |
| +30 User Tokens | $0.29 | one-time |
| +1 Convenience Token / 6h, max. +2 | $0.59 | one-time |
| +2 Convenience Tokens / 6h, max. +4 | $0.99 | one-time |
| +150 User Tokens | $0.99 | one-time |
| +300 User Tokens | $1.49 | one-time |
| +4 Convenience Tokens / 6h, max. +8 | $1.59 | one-time |
| Remove Ads | $1.99 | one-time |
| Lifetime Access | $1.99 | one-time |


### Attestator

[App page](https://appshunter.io/ios/app/attestator/id6472697971)

**In-app purchases:** none


## Frequently asked questions

### Is Parametric Factorization free?

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

### Is Attestator free?

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

### Do Parametric Factorization or Attestator have ads?

Neither Parametric Factorization nor Attestator shows ads.

### Which is updated more often, Parametric Factorization or Attestator?

Parametric Factorization ships an update fortnightly, and Attestator every 6 days. Most recently, Parametric Factorization was updated on September 14, 2026 and Attestator on September 19, 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.*