Block Door Study vs Deck Flow's
Price, ratings, monetisation and update history for both apps, side by side β with what reviewers say about each.
Block Door Study
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Block Door Study helps you build and organize personal flashcard decks for everyday learning. Create cards, review material, test yourself, and monitor study progress with clear statistics and flexible review tools. Visual tower progression rewards consistent study as successful review sessions unlock new doors and complete knowledge floors. Personal tags, archive, mini quizzes, manual difficulty, and local progress tracking create a focused study experience while keeping all information stored on your device
Deck Flow's
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Most deck calculators do area times price and stop there. That number won't tell you the joists are too far apart for the board you picked, or that your beam can't carry the span between posts, or that half your board joints are landing in mid-air instead of over a joist. Deck Flow works the deck from the footing up, the way you actually build it. You give it the size and the height off the ground. It sets the joist spacing for your board thickness and direction β tighter for diagonal boards, on its own β and lays out the joists so the boards sit without sag and every joint falls over a joist, not between them. It checks the beam against the span and flags it when the posts are too far apart. It sizes the footings, the concrete, and the ledger fixing to the house with flashing so water doesn't get behind it. Then it counts the real build. Boards across the joists with an expansion gap and the row lengths, staggered joints with a picture-frame border, screws or hidden clips down to the exact count so you're not driving back for a box mid-job. Board gaps, slope away from the house, airflow underneath. Railing and steps. A material list and a cost estimate at the end. It even holds you to the order: footings first, and the frame stays locked until the concrete's had time to cure, because a deck built on green footings moves.
Screenshots
Verdict
The clearest difference is device support: Deck Flow's at 3 against Block Door Study's 1. Deck Flow's also leads on iOS requirement (15.0 vs 17.0). On price, ads and in-app purchases there is nothing between them.
Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
| Parameter | Block Door Study | Deck Flow's |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 2 weeks | β |
| Ads | Yes | Yes |
| In-app purchases | No | No |
| Devices | iPhone | iPhone, iPad, iPod β better |
| Requires iOS | 17.0 | 15.0 β better |
| Further details β not scored | ||
| Size | 4 MB | 22 MB |
| Age rating | 17+ | 17+ |
| Developer | Ryan Sullivan | John Collins |
In-app purchases
Block Door Study
No in-app purchases
Deck Flow's
No in-app purchases





