Span Calc vs DealFlow app
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Span Calc
Calculate maximum horizontal spans for wood joists and rafters using various lumber species and grades. Compares multiple options for common loading conditions based on NDS® standards.
- Calculates joist and rafter spans
- Supports all softwood and hardwood lumber
- Uses 2021 NDS® for Wood Construction
- Compares multiple species and grades
- Handles common loading conditions
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The American Wood Council (AWC) Span Calculator for Wood Joists and Rafters (Span Calc) performs calculations for all species and grades of commercially available softwood and hardwood lumber as found in the 2021 National Design Specification® (NDS®) for Wood Construction. Joists and rafter spans for common loading conditions can be determined. A span options calculator allows selection of multiple species and grades for comparison purposes. Supported by the Softwood Lumber Board. Maximum horizontal spans for joists and rafters are calculated based on the following assumptions and conditions: · Joists and rafters are oriented to support vertical loads applied to the narrow (1.5 in. thick) face of the member, resulting in strong-axis bending. · At least three joists or rafters are installed parallel to one another and spaced not more than 24 inches on-center, with properly designed sheathing attached on the top (compression) edge of each joist or rafter. · Joists and rafters are single-span with adequate structural support at each end. The Span Calculator does not address cantilevered joists and rafters, multiple-span joists and rafters, or spliced joists and rafters. · For joists and rafters, most building codes specify a minimum bearing length of 1.5 inches on wood or metal and not less than 3 inches on masonry or concrete. These minimum bearing lengths are to be used in the absence of calculated bearing lengths. Consult the local building code for specific requirements. · Joists and rafters carry only combinations of dead load plus live load (D + L), dead load plus snow load (D + S), or dead load plus roof live load (D + Lr). The Span Calculator does not address wind load or seismic load. · Buildings in regions with ground snow loads greater than 70 psf should not use the prescriptive provisions of the governing building code without approval of the authority having jurisdiction. Buildings in these high snow zones should be designed in accordance with accepted engineering practice. While every effort has been made to insure the accuracy of the information presented, and special effort has been made to assure that the information reflects the state-of-the-art, neither the American Wood Council nor its members assume any responsibility for any particular design prepared from this Span Calculator application. Those using this Span Calculator assume all liability from its use.
DealFlow app
Calculate fair trade and cash values for trading cards instantly. Features an AI-powered scanner for quick pricing and a trade history to track your deals. Built for Pokémon TCG traders with more games planned.
- Instant trade calculator
- AI-powered card scanner
- Multiple card trade totals
- Trade history
- Coin flip for fair trades
- Manual card search with live pricing
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DealFlow is the fastest way to calculate fair trade and cash values for your trading card deals. Whether you're at a card shop, a trade meetup, or buying online, DealFlow gives you real-time pricing so you never leave value on the table. FEATURES: • Instant trade calculator with adjustable trade % and cash % • Add multiple cards to a single trade and see running totals • AI-powered card scanner — point your camera and get pricing instantly • Trade history to track every deal you've made • Coin flip to settle trades fairly • Search cards manually with live pricing data DEALFLOW PRO: • Unlimited AI card scanning • Full trade history with folders • Per-item pricing breakdown • Coin flip history Built for Pokémon TCG traders. More card games coming soon. https://dealflow-landing-delta.vercel.app/terms
Screenshots
Verdict
The clearest difference is review sentiment: DealFlow app at 100% against Span Calc's 30%. DealFlow app also leads on rating (5.0 vs 2.9). Span Calc's advantage is monetization model (free vs free with in-app purchases) and ratings volume (15 vs 1). On price, update cadence, 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.
DealFlow app holds the better App Store score, 5.0 against 2.9. That said, the two scores are not equally well evidenced: Span Calc has 15 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 30% of Span Calc's written reviews are positive against 100% of DealFlow app's.
Span Calc ships an update every 10 days, DealFlow app every 3 weeks. The most recent releases landed on October 12, 2026 and October 13, 2026 respectively.
| Parameter | Span Calc | DealFlow app |
|---|---|---|
| Price | Free | Free |
| Rating | 2.9 (15 ratings) | 5.0 (1 ratings) — better |
| Positive reviews | 29.6% of reviews | 100.0% of reviews — better |
| Number of ratings | 15 — better | 1 |
| Update frequency | Every 10 days — better | Every 3 weeks |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 14.2 — better | 15.5 |
| Further details — not scored | ||
| Size | 168 MB | 185 MB |
| Age rating | 17+ | 4+ |
| Developer | American Wood Council | Carlos Ramirez |
Customer experience
Span Calc
DealFlow app
In-app purchases
Span Calc
No in-app purchases
DealFlow app
No in-app purchases









