# Factorium vs D

The clearest difference is review sentiment: Factorium at 80% against D's 0%. Factorium also leads on update cadence (every 6 days vs monthly). D's advantage is iOS requirement (13.0 vs 15). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Factorium ships an update every 6 days, D monthly. The most recent releases landed on October 8, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | Factorium | D |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | **80.0% of reviews** | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 6 days** | Monthly |
| Monetization | Free | Free |
| Size | 130 MB | 105 MB |
| Requires iOS | 15 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [SYSTEM STONE COMPANY LIMITED](https://appshunter.io/developer/1165810393) | [PTT ICT Solutions Company Limited](https://appshunter.io/developer/459684765) |

## What reviewers say

### Factorium

[App page](https://appshunter.io/ios/app/factorium/id1165810394)

This maintenance management software helps reduce costs and increase operational efficiency by implementing Total Productive Maintenance principles. It offers systematic planning for preventive maintenance, streamlined repair requests with photo attachments, efficient spare part management, and calibration tracking for labs and quality control.

**Highlights:** Preventive Maintenance scheduling, Paperless Repair Requests, Spare Part Management, Calibration Tracking, Automated Task Assignment, Picture Attachments for Issues

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

**In-app purchases:** none


### D

[App page](https://appshunter.io/ios/app/d-happy/id1547832499)

Streamline your modern work life with efficient tools for leave planning and internal communication. Connect with colleagues through an integrated organizational directory for faster collaboration.

**Highlights:** Efficient leave planning, Mobile leave management, Internal organizational communication, Colleague contact directory

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

**In-app purchases:** none


## Frequently asked questions

### Is Factorium free?

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

### Is D free?

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

### Do Factorium or D have ads?

Neither Factorium nor D shows ads.

### Which is updated more often, Factorium or D?

Factorium ships an update every 6 days, and D monthly. Most recently, Factorium was updated on October 8, 2026 and D on October 10, 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.*