# SubStandard vs RosterSync

SubStandard and RosterSync both sit at 5.0 stars, but that hides the real split: 80% of RosterSync's written reviews are positive against 0% of SubStandard's. RosterSync also leads on update cadence (every 3 days vs every 7 months). SubStandard's advantage is in-app purchases (none vs 1) and ads (none vs shown). On price, rating, ratings volume and device support there is nothing between them.

Both are free to download. RosterSync sells 1 one-off in-app purchase. SubStandard asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 5.0 for SubStandard against 5.0 for RosterSync. Both are backed by a comparable volume of ratings — 2 and 3 respectively. Written reviews are what separate them: 0% of SubStandard's written reviews are positive against 80% of RosterSync's.

SubStandard ships an update every 7 months, RosterSync every 3 days. The most recent releases landed on October 6, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | SubStandard | RosterSync |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (2 ratings)](https://appshunter.io/ios/app/substandard/id1513656520/reviews) | [5.0 (3 ratings)](https://appshunter.io/ios/app/rostersync/id6759645143/reviews) |
| Number of ratings | 2 | **3** |
| Positive reviews | 0.0% of reviews | **80.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 7 months | **Every 3 days** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 33 MB | 62 MB |
| Requires iOS | **12.0** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [iService Ottner Röck](https://appshunter.io/developer/1413717324) | [AeroSync Studio](https://appshunter.io/developer/1888070954) |

## What reviewers say

### SubStandard

[App page](https://appshunter.io/ios/app/substandard/id1513656520)

This aviation utility app simplifies applying cold temperature corrections for altitudes. It allows users to save frequently used altitude sets for rapid retrieval, enhancing efficiency in flight planning.

**Highlights:** Cold temperature corrections, Altitude set storage, Quick access to saved altitudes, Easy to use interface

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

**In-app purchases:** none


### RosterSync

[App page](https://appshunter.io/ios/app/rostersync/id6759645143)

Manage and share your flight schedules with airline crew. This utility automatically syncs your roster, offers robust security for login credentials, and allows real-time schedule comparison with colleagues. Export your schedule to your native calendar for seamless organization.

**Highlights:** Automated schedule sync, Secure credential storage, Real-time schedule sharing, Cross-comparison with colleagues, Calendar export (iCloud/Google), Privacy permission settings

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro 버전 업그레이드 | $2.99 | one-time |


## Frequently asked questions

### Is SubStandard free?

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

### Is RosterSync free?

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

### Which has better reviews, SubStandard or RosterSync?

SubStandard and RosterSync are both rated 5.0 out of 5 on the App Store, from 2 and 3 ratings respectively.

### Do SubStandard or RosterSync have ads?

RosterSync shows ads; SubStandard does not.

### Which is updated more often, SubStandard or RosterSync?

SubStandard ships an update every 7 months, and RosterSync every 3 days. Most recently, SubStandard was updated on October 6, 2026 and RosterSync on October 12, 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.*