SubStandard vs Joanes
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.
Joanes
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Joanes is the app designed by and for painters. Whether you work in oil, acrylic or watercolor, Joanes accompanies you from picking colors to the brushstroke. — REFERENCE ANALYSIS Import a photo, tap any point, and Joanes identifies the closest pigment in your range. Calibrate the white for maximum accuracy. — KUBELKA-MUNK ENGINE All mixes are calculated using the spectral physical model used by color chemists. No more guesswork: you know exactly which pigments to mix and in what proportions to achieve a target color. — MY PALETTE Photograph your real palette, Joanes identifies each dab and tells you which pigments you've laid out. — AR TRACING Project your sketch in augmented reality directly onto your canvas. Place it, adjust it, choose between normal view and contour view (ghost), then trace. — STEP BY STEP Break down any photo into 5 classic painting steps: imprimatura, block-in, values, details, finish. With the pigments to use at each step. — TRAIN YOUR EYE Color recognition challenges in easy, medium or expert mode. Earn bronze, silver and gold trophies per color. — 100% OFFLINE No account, no data sent online. Your photos and creations stay on your device. Available in French, English, Spanish, Portuguese, German, Italian, Japanese.
Screenshots
Verdict
The clearest difference is update cadence: Joanes at every 3 days against SubStandard's every 7 months. SubStandard's advantage is device support (3 vs 1) and iOS requirement (12.0 vs 16.6). On price, ads and in-app purchases 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. Neither carries in-app purchases, so what you see is what you pay.
SubStandard ships an update every 7 months, Joanes every 3 days. The most recent releases landed on October 20, 2026 and October 12, 2026 respectively.
| Parameter | SubStandard | Joanes |
|---|---|---|
| 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 3 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 12.0 — better | 16.6 |
| Further details — not scored | ||
| Size | 33 MB | 8 MB |
| Age rating | 4+ | 4+ |
| Developer | iService Ottner Röck | JEAN EBOLO AHANDA |
In-app purchases
SubStandard
No in-app purchases
Joanes
No in-app purchases









