SubStandard vs Jetlog
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.
Jetlog
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Jetlog is the modern pilot logbook designed for professional aviators. Track your flights with real-time updates, generate EASA-compliant reports, and keep your logbook synced across all your devices. • Sub-second real-time sync across devices • Simulator treated as a first-class citizen • Correct ATPL progress tracking • Automatic EASA rule validation (including PICUS) • Instructor and examiner roles supported • Automatic ICS roster import • KLC-rooster.nl integration • KLM ACARS auto-logging • Third-party API support • EASA-compliant exports • Offline-first with local data ownership Jetlog is currently fully usable for free until features are matured. An optional subscription supports continued development and infrastructure. Get started free today and experience fan-tastic logging. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is in-app purchases: SubStandard at none against Jetlog's 3. SubStandard also leads on iOS requirement (12.0 vs 26.0). Jetlog's advantage is update cadence (every 10 days vs every 7 months). On price, ads and device support 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. Jetlog sells 3 in-app purchases, starting at $2.99 per month. SubStandard asks for nothing beyond the download.
SubStandard ships an update every 7 months, Jetlog every 10 days. The most recent releases landed on October 20, 2026 and October 24, 2026 respectively.
| Parameter | SubStandard | Jetlog |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (2 ratings) — better | — |
| Positive reviews | 0.0% of reviews | — |
| Number of ratings | 2 — better | — |
| Update frequency | Every 7 months | Every 10 days — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Apple Watch |
| Requires iOS | 12.0 — better | 26.0 |
| Further details — not scored | ||
| Size | 33 MB | 35 MB |
| Age rating | 4+ | 4+ |
| Developer | iService Ottner Röck | Deskpage |
In-app purchases
SubStandard
No in-app purchases
Jetlog
- Monthly$2.991 Month
- Yearly$29.991 Year
- Logbook AI Scans Credit (50)$2.99
