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Architectural Record has compiled a handy list of . Apps are often difficult to find, as they fall under several different categories in the iTunes app store. They also have a learning curve, but can be useful. 鈥淵ou can save time and money if you have tools at your fingertips and can do work at job sites,鈥澛� said architect Gordon Arnold, AIA, of Fort Worth, Texas.

The list is below. Commenters on the story also recommended , a guide to Americans with Disabilities Act compliance.

1. Project Photo
$2.99, plus purchase of related application
Archives photos taken with an iPhone. Each photo is tagged with its GPS point. Photos can then be linked to construction drawings and plans.
Offered by Cosential

2. Concrete Calc
99 cents
Figures the cubic yards of concrete needed for a job.
Offered by Jeremy Breaux
N/A

3. Smart Thermostat
Free, with purchase of a thermostat
Remotely adjusts the temperature at home. Lets users program vacation settings. Alerts if it gets too hot at home.
Offered by ecobee

4. Design Data Engineering Materials
$.99
Provides data about the tensile strength, weldability, and density of certain metals.
Offered by Miro Mundik

5. Architecture
Free three-day trial; then, $4.99
Uses GPS to alert about major landmarks nearby. Projects are from 165 different architects in 270 cities. Also maps them.
Offered by Makayama Media

6. Dual Level
$.99
Turns phones into spirit levels.
Offered by Geometry

7. Carpenter鈥檚 Helper Pro
$9.99
Calculates roof pitch and column volume, and convert meters to feet.
Offered by My Pie Interactive

8. Architect鈥檚 Formulator
$9.99
Its 200 formulas help determine how many bricks a wall might need, the wind load of roofs, and the number of joists required for a home.
Offered by Multieducator

9. Flashlight
Free
Turns a phone鈥檚 screen white to provide illumination.
Offered by John Haney

10. Save H2O
Free
Determines water usage of major appliances and suggests ways of improving their efficiency with Sloan Valve Company products.
Offered by KeyLimeTie

11. Free Boston
$.99
Provides information about free tours of Boston-area landmarks.
Offered by Raza Enterprises

12. ICEvision
Free
Allows images created in AutoCAD and Revit images to be viewed in 3-D formats.
Offered by Ice Edge Business Solutions

13. Home Interior Layout Design
$2.99
Furniture, cabinets, and appliances can be positioned on floor plans by clients and then sent back to the architects.
Offered by MOC Interior Design

14. uSketchit+
$2.99
Lines can be drawn over special 鈥減aper鈥� place
over photos.
Offered by Citygraphs

15. Palettes Pro
$9.99
Isolate colors from a photo and then export them
to Photoshop.
Offered by Richard Maddy
N/A