# Sou UPF vs Combinatorics Calculator

The clearest difference is in-app purchases: Sou UPF at none against Combinatorics Calculator's 8. Combinatorics Calculator's advantage is update cadence (every 3 weeks vs every 2 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Combinatorics Calculator sells 8 one-off in-app purchases. Sou UPF asks for nothing beyond the download.

Sou UPF ships an update every 2 months, Combinatorics Calculator every 3 weeks. The most recent releases landed on June 4, 2026 and September 14, 2026 respectively.

## The numbers

| Metric | Sou UPF | Combinatorics Calculator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/sou-upf/id1177643217/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 33.3% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 3 weeks** |
| Monetization | Free | — |
| Size | 25 MB | 180 MB |
| Requires iOS | 15.1 | **15.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [FUNDACAO UNIVERSIDADE DE PASSO FUNDO](https://appshunter.io/developer/1177643216) | [Glindemann, Sennoun, Langer GbR](https://appshunter.io/developer/1024972809) |

## What reviewers say

### Sou UPF

[App page](https://appshunter.io/ios/app/sou-upf/id1177643217)

This app connects students with their university, providing access to academic information, notifications, and library services. Stay updated on grades, schedules, and important announcements directly from your device.

**Highlights:** Academic notifications, Grade and attendance tracking, Class schedule access, Library book renewal, Message archiving, Academic calendar access

**Features:** macOS Compatibility

**In-app purchases:** none


### Combinatorics Calculator

[App page](https://appshunter.io/ios/app/combinatorics-calculator/id6472453602)

**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 |
| Lifetime Access | $1.99 | one-time |
| Remove Ads | $1.99 | one-time |


## Frequently asked questions

### Is Sou UPF free?

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

### Is Combinatorics Calculator free?

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

### Do Sou UPF or Combinatorics Calculator have ads?

Neither Sou UPF nor Combinatorics Calculator shows ads.

### Which is updated more often, Sou UPF or Combinatorics Calculator?

Sou UPF ships an update every 2 months, and Combinatorics Calculator every 3 weeks. Most recently, Sou UPF was updated on June 4, 2026 and Combinatorics Calculator on September 14, 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.*