SubStandard vs Let's Go Pro
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.
Let's Go Pro
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Lets Go Pro is your smart travel assistant that never lets you be late. Enter your arrival time, and the app takes care of the rest. Using real-time traffic data, it calculates exactly when you need to leave, and alerts you 30 – 15 – 5 minutes before departure and at the exact moment you need to go. FEATURES • Live traffic monitoring — your departure time updates continuously based on traffic • Weekly routines — automatic traffic check every morning, with notifications updated accordingly • Voice navigation — automatic spoken turn-by-turn directions • Custom alert timing — get notified exactly when you want • Multiple route options — fastest, no tolls, public transit, walking • Pick location on map — set your starting point and destination by tapping directly on the map • Estimated fuel cost — enter your fuel price (auto-filled based on your location in Turkey), and instantly see the estimated fuel cost for every trip • Map views — standard, satellite, and hybrid map • Speedometer and speed limit warnings • Trip statistics — track your past journeys • Favorites — save the places you go to most Privacy Policy: https://bahadirvolkan.github.io/letsgo-privacy/ Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is in-app purchases: SubStandard at none against Let's Go Pro's 1. SubStandard also leads on iOS requirement (12.0 vs 15.1). Let's Go Pro's advantage is update cadence (every 6 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. Let's Go Pro sells 1 in-app purchase, starting at $4.99 per year. SubStandard asks for nothing beyond the download.
SubStandard ships an update every 7 months, Let's Go Pro every 6 days. The most recent releases landed on October 6, 2026 and October 10, 2026 respectively.
| Parameter | SubStandard | Let's Go Pro |
|---|---|---|
| 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 6 days — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 12.0 — better | 15.1 |
| Further details — not scored | ||
| Size | 33 MB | 52 MB |
| Age rating | 4+ | 4+ |
| Developer | iService Ottner Röck | Bahadir Volkan Ozalp |
In-app purchases
SubStandard
No in-app purchases
Let's Go Pro
- Let's Go Pro7 Days trial$4.991 Year









