SubStandard vs Manual Sync
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
SubStandard
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.
- Cold temperature corrections
- Altitude set storage
- Quick access to saved altitudes
- Easy to use interface
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SubStandard is an easy to use app to apply cold temperature corrections in aviation. Moreover, it lets you store sets of altitudes for quick access later on.
Manual Sync
Easily transfer annotations and bookmarks between PDF documents. This tool uses precise matching for professionals who update manuals frequently, ensuring notes stay in place. All processing is done locally for enhanced privacy.
- Smart word-based annotation matching
- Bookmark hierarchy migration
- Split-view manual review
- Local device processing
- Annual and lifetime subscription options
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ManualSync: Effortless PDF Revision Assistant Seamlessly transfer your annotations and bookmarks to revised PDF manuals in seconds. Designed for professionals who handle frequent document updates, ManualSync uses high-precision matching to ensure your notes land exactly where they belong. Key Features: Smart word-based annotation matching Bookmark hierarchy migration Split-view manual review Privacy First: All processing happens locally on your device. Your manuals never leave your side. [Subscription Information] • ManualSync Annual Premium: $9.99/year (Includes a 3-day free trial) • ManualSync Lifetime Access: $24.99 (One-time purchase) [Payments and Renewal] • Payment will be charged to your iTunes Account at confirmation of purchase. • Subscription automatically renews unless auto-renew is turned off at least 24-hours before the end of the current period. • Your account will be charged for renewal within 24-hours prior to the end of the current period. • You can manage or turn off auto-renew in your Apple ID Account settings at any time after purchase. • No cancellation of the current subscription is allowed during the active period. • Terms of Use (Standard Apple EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ • Privacy Policy: https://aerosyncstudio.kr/privacy-manualsync.html
Screenshots
Verdict
The clearest difference is in-app purchases: SubStandard at none against Manual Sync's 2. SubStandard also leads on device support (3 vs 1) and iOS requirement (12.0 vs 17.6). Manual Sync's advantage is update cadence (every 2 days vs every 7 months). On price, rating, ratings volume and ads there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Manual Sync sells 2 in-app purchases, starting at $9.99 per year. 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 Manual Sync. Both are backed by a comparable volume of ratings — 2 and 1 respectively.
SubStandard ships an update every 7 months, Manual Sync every 2 days. The most recent releases landed on October 6, 2026 and October 3, 2026 respectively.
| Parameter | SubStandard | Manual Sync |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (2 ratings) | 5.0 (1 ratings) |
| Positive reviews | 0.0% of reviews | — |
| Number of ratings | 2 — better | 1 |
| Update frequency | Every 7 months | Every 2 days — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 12.0 — better | 17.6 |
| Further details — not scored | ||
| Size | 33 MB | 2 MB |
| Age rating | 4+ | 4+ |
| Developer | iService Ottner Röck | AeroSync Studio |
Customer experience
SubStandard
Manual Sync
In-app purchases
SubStandard
No in-app purchases
Manual Sync
- ManualSync Annual Premium$9.991 Year
- ManualSync Annual Premium$24.99
