Angle Cut Guide – Miter Calc

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Everyone
5+
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Everyone
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About this app

For cutting gutters, curbs, blocks and timber at an angle.
Measure the cut angle and read the cut length.

■ Two ways to measure
・Camera: shoot the material and line up the guide
・Hold to measure (Pro): just hold the phone against the material. It does not use a compass, so rebar and steel do not affect it
・You can measure both ways and compare the difference

■ How to use
① Choose the cut (join two pieces / join to a surface)
② Enter the material width (mm or inches)
③ Choose how to measure, and measure the angle
④ The cut length is calculated

■ Tools
・Frames & polygons: miter angles for 4, 6, 8 sides and cutting from stock
・Curves: the opening angle and cut length when joining straight pieces along a curve. No radius needed - enter the span and the bulge
・Joints: the joint gaps (outer and inner) and how many pieces fit when setting along a curve without cutting
・Setting check (Pro): verify each piece against the string, one by one

■ Also
・Automatic offset for chamfers and a narrower bottom face
・Full screen, pinch zoom and a magnifier while you drag the line
・Tilt readout, freeze the screen to line things up slowly
・Readable in sunlight (brightness control on supported devices, high contrast and mono)
・Save the materials you use often
・Share or save the result as an image with the drawing
・Save measurements with a note; export to CSV or a backup
・Measure from a photo you already took
・Lock the screen orientation

■ On site
・Works even where there is no signal
・6 languages (Japanese, English, Vietnamese, Chinese, Portuguese, Filipino)

■ About Pro
A one-time purchase that removes the ads and unlocks “Hold to measure” and the setting check.
You can try it free at first (3 times a day for 5 days).

■ Please note
・Leave a few mm of margin when marking, and adjust with the joints after cutting
・Angles have some error (how the camera sees it, the phone tilt, drift over time). Confirm anything critical on the material itself
Measure the angle by camera or by holding the phone, and get the cut length.
Updated on
Sep 19, 2026
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Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
  • This app may share these data types with third parties
    Device or other IDs
  • This app may collect these data types
    Device or other IDs
  • Data is encrypted in transit

What’s new

・スマホを材料に当てて角度を測れるようになりました(Pro)
・水糸を基準に、据えた材料の角度を1本ずつ確かめられる「据付チェック」を追加しました(Pro)
・曲線や半円に据えるときの「目地の開き」を計算できるようになりました
・枠・多角形/曲線の入力を分かりやすくし、1画面で操作できるよう画面を整えました
Content rating
Everyone
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App support

About the developer
HACTOOLS
contact@hactools.dev
495, KAGANOI, SHIMONAKACHO HASHIMA, 岐阜県 501-6313 Japan
+81 90-1109-5461