# SubItUp vs TDM OS

The clearest difference is review sentiment: TDM OS at 100% against SubItUp's 13%. TDM OS also leads on rating (5.0 vs 1.9). SubItUp's advantage is ratings volume (231 vs 2). On price, update cadence, ads and in-app purchases there is nothing between them.

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

TDM OS holds the better App Store score, 5.0 against 1.9. That said, the two scores are not equally well evidenced: SubItUp has 231 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 13% of SubItUp's written reviews are positive against 100% of TDM OS's.

SubItUp ships an update every 2 weeks, TDM OS every 10 days. The most recent releases landed on October 14, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | SubItUp | TDM OS |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [1.9 (231 ratings)](https://appshunter.io/ios/app/subitup/id468245296/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/tdm-os/id6782860325/reviews)** |
| Number of ratings | **231** | 2 |
| Positive reviews | 13.3% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 weeks | **Every 10 days** |
| Monetization | Free | Free |
| Size | 48 MB | 41 MB |
| Requires iOS | 15.1 | 15.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [SubItUp](https://appshunter.io/developer/468245301) | [Touchdown Promotions LLC](https://appshunter.io/developer/6782860327) |

## What reviewers say

### SubItUp

[App page](https://appshunter.io/ios/app/subitup/id468245296)

Manage your work schedule, request time off, and swap shifts with colleagues. For managers, this app allows for shift creation, editing, and approval of requests.

**Highlights:** View work schedule, Request time off, Add, Drop, or Swap shifts, Create and edit shifts, Approve shift requests, Approve RTOs

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

**In-app purchases:** none


### TDM OS

[App page](https://appshunter.io/ios/app/tdm-os/id6782860325)

This app functions as a product marketplace with integrated messaging. Users can browse, search, and filter items, view stock status, and communicate directly with sellers through a unified inbox.

**Highlights:** Browse and search product catalog, Filter by category, View current stock status, Direct messaging with sellers, Unified inbox with unread indicators, Product photos, descriptions, and pricing

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

**In-app purchases:** none


## Frequently asked questions

### Is SubItUp free?

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

### Is TDM OS free?

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

### Which has better reviews, SubItUp or TDM OS?

TDM OS is rated higher. SubItUp averages 1.9 out of 5 from 231 ratings, while TDM OS averages 5.0 from 2 ratings.

### Do SubItUp or TDM OS have ads?

Neither SubItUp nor TDM OS shows ads.

### Which is updated more often, SubItUp or TDM OS?

SubItUp ships an update every 2 weeks, and TDM OS every 10 days. Most recently, SubItUp was updated on October 14, 2026 and TDM OS 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.*