SubStandard vs FFBrief
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.
FFBrief
This app uses AI to analyze weather briefings from ForeFlight, providing instant go/no-go recommendations and hazard detection. It simplifies complex aviation weather data into plain language, offering pilot advice and timezone conversions.
- AI-powered weather briefing analysis
- Go/No-Go recommendation with reasoning
- VFR, MVFR, IFR, LIFR classification
- Hazard detection (thunderstorms, icing, etc.)
- Pilot advice on altitude and timing
- UTC to local timezone conversion
- ForeFlight integration via share sheet
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FFBrief requires an active subscription to access all features. A 7-day free trial is included — $4.99/year after the trial period. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://dsiegel12.github.io/ffbrief-support FFBrief brings AI-powered analysis to your ForeFlight weather briefings. Share any ForeFlight briefing directly to FFBrief — PDF or HTML — and get an instant, plain-language go/no-go recommendation in seconds. WHAT YOU GET • Go/No-Go recommendation with clear reasoning • VFR, MVFR, IFR, and LIFR classification for departure and destination • Hazard detection: thunderstorms, icing, turbulence, TFRs, wind shear, and more • Detailed pilot advice on altitude, timing, and alternates • UTC times automatically converted to your local timezone • Full ForeFlight integration via the iOS share sheet HOW IT WORKS Open ForeFlight, generate your weather briefing, tap the share icon, and choose FFBrief. The app analyzes your briefing using Claude AI and returns a structured, easy-to-read analysis in seconds. Supports both HTML and PDF briefing formats.
Screenshots
Verdict
The clearest difference is in-app purchases: SubStandard at none against FFBrief's 1. SubStandard also leads on iOS requirement (12.0 vs 17.0). FFBrief's advantage is update cadence (weekly 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. FFBrief sells 1 in-app purchase, starting at $4.99 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 FFBrief. Both are backed by a comparable volume of ratings — 2 and 1 respectively.
SubStandard ships an update every 7 months, FFBrief weekly. The most recent releases landed on September 9, 2026 and August 29, 2026 respectively.
| Parameter | SubStandard | FFBrief |
|---|---|---|
| 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 | Weekly — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Subscription |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 12.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 33 MB | 1 MB |
| Age rating | 4+ | 4+ |
| Developer | iService Ottner Röck | DONALD STEVEN SIEGEL |
Customer experience
SubStandard
FFBrief
In-app purchases
SubStandard
No in-app purchases
FFBrief
- FFBrief Annual7 Days trial$4.991 Year
