# Prion vs Abbum

The clearest difference is review sentiment: Prion at 100% against Abbum's 0%. Prion also leads on update cadence (every 2 weeks vs every 5 months). Abbum's advantage is in-app purchases (none vs 2) and iOS requirement (11.0 vs 13.0). On price, ads and device support there is nothing between them.

Both are free to download. Prion sells 2 in-app purchases, starting at $1.99 per month. Abbum asks for nothing beyond the download.

Prion ships an update every 2 weeks, Abbum every 5 months. The most recent releases landed on September 10, 2026 and September 16, 2026 respectively.

## The numbers

| Metric | Prion | Abbum |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[2.0 (1 ratings)](https://appshunter.io/ios/app/abbum/id1205963216/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | **100.0% of reviews** | 0.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Every 5 months |
| Monetization | Free with in-app purchases | **Free** |
| Size | 26 MB | 9 MB |
| Requires iOS | 13.0 | **11.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Prion AB](https://appshunter.io/developer/924506637) | [Vitec Samfundssystem AB](https://appshunter.io/developer/1626442636) |

## What reviewers say

### Prion

[App page](https://appshunter.io/ios/app/prion/id924506638)

This app facilitates communication, documentation, and administration for preschools. It allows guardians to track their child's development and communicate with the preschool, while teachers can manage pedagogical documentation and attendance.

**Highlights:** Pedagogical documentation, Attendance and schedule management, Multimedia support for documentation, Digital notes and comments, Push notifications, Automatic reminders, Translation of text

**Features:** Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Prion Plus Month Subscription | $1.99 | per month |
| Prion Plus 7 day pass | $1.99 | one-time |


### Abbum

[App page](https://appshunter.io/ios/app/abbum/id1205963216)

This digital tool simplifies daily preschool operations. It offers features for educational documentation, attendance tracking, parent communication, and quality improvement.

**Highlights:** Educational documentation, Attendance management, Parent communication, Quality improvement tracking, Daily preschool operations simplification

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Prion free?

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

### Is Abbum free?

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

### Do Prion or Abbum have ads?

Neither Prion nor Abbum shows ads.

### Which is updated more often, Prion or Abbum?

Prion ships an update every 2 weeks, and Abbum every 5 months. Most recently, Prion was updated on September 10, 2026 and Abbum on September 16, 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.*