SubStandard vs Stage Builder X
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.
Stage Builder X
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Stage builder and planer that can be used to get a complete breakdown of parts and platforms. the app uses the (4-2-2-1 principle) for leg placement. Design can be saved and shared with others.
Screenshots
Verdict
The clearest difference is price: SubStandard at Free against Stage Builder X's $19.99. SubStandard also leads on iOS requirement (12.0 vs 15.1). Stage Builder X's advantage is update cadence (every 11 days vs every 7 months). On ads, in-app purchases 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
SubStandard is free to download; Stage Builder X costs $19.99 up front. Neither carries in-app purchases, so what you see is what you pay.
SubStandard ships an update every 7 months, Stage Builder X every 11 days. The most recent releases landed on September 9, 2026 and September 8, 2026 respectively.
| Parameter | SubStandard | Stage Builder X |
|---|---|---|
| Price | Free — better | $19.99 |
| Rating | 5.0 (2 ratings) — better | — |
| Positive reviews | 0.0% of reviews | — |
| Number of ratings | 2 — better | — |
| Update frequency | Every 7 months | Every 11 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 12.0 — better | 15.1 |
| Further details — not scored | ||
| Size | 33 MB | 36 MB |
| Age rating | 4+ | 4+ |
| Developer | iService Ottner Röck | STURE MOSLAATTEN |
In-app purchases
SubStandard
No in-app purchases
Stage Builder X
No in-app purchases
Questions
Is SubStandard free?
Is Stage Builder X free?
Do SubStandard or Stage Builder X have ads?
Which is updated more often, SubStandard or Stage Builder X?
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