Pipe Offset & Cut Length vs 配管ピタ寸
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Pipe Offset & Cut Length
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Rolling offsets, solved before you cut. Pick the fitting and the size, type what you measured, and you get the cut length with the takeoff (Z in the standards) already subtracted from both ends. Mark the pipe and cut it. ■ If it will not go together, you hear it first A positive number does not mean it can be assembled. When the socket depths would overlap, the app finds it before you cut and shows what does fit — a fitting with a smaller angle, or one size down. ■ Offsets that move in two directions For a rolling offset, the app separates true offset, run, travel (center to center) and the roll angle. It works at 22.5° and 11.25° as well as 45°, and when the run you have is fixed, it can solve for the angle instead. ■ Every number carries its source Welded fittings use the bend radius R = 38.1 x nominal size (inch) with ASME B16.9 for the 45° center-to-end; PVC DWV uses the published fitting dimensions. Japanese standards (JIS K 6739 / K 6743 / K 6777, JIS B 2301) are there when you switch regions. Tap the info button next to the answer to read where a number came from. ■ Elbows that aren't built in: measure and add them Measure an elbow once and register it, and every calculation after that uses its actual dimensions. Thread engagement can be adjusted per size, one thread at a time. ■ Keep it per job, hand it over on paper Add an answer to a job and it becomes a table: piece number, cut length, fitting, roll angle. Export it as a PDF or CSV. Register a fitting and the numbers on the paper are recomputed too. ■ Works with no connection Everything is computed on the device. Job records stay on this device only — they are not stored in iCloud, so they cannot move to a new phone. What leaves the device is your support messages, plus anonymous usage statistics and crash diagnostics (Firebase Analytics / Crashlytics). ■ About pricing Cut length for a straight run between two fittings, the 45° offset in one plane, the 78 bundled fittings and the welded formula are free, always. Rolling offsets, 22.5° and 11.25°, solving for the angle, your own measured fittings and thread engagement, and job cut lists (PDF/CSV) are Pro. There is a one-time purchase, or monthly and yearly plans. ■ Units and standards Switch between inch (ASME, North America) and mm (JIS, Japan). In North America the fittings become ASME B16.9 (welded) and PVC DWV, and the 45° center-to-end is read from the published table. What the app shows is a guide for installation. The final call belongs to the job's own standards and a licensed fitter. The app does not reproduce standards documents or manufacturer catalogues — it cites the number and name of the standard, the maker and the revision, and computes dimensions from published values and formulas. Monthly and yearly plans renew automatically. You can cancel in Settings > your name > Subscriptions on your iPhone. The one-time purchase does not renew. Terms of Use: https://rainbowtree.work/app/terms Privacy Policy: https://rainbowtree.work/privacy/haikan-kirisunpo.html
配管ピタ寸
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「配管ピタ寸」は、配管職人のための切り寸計算電卓です。 普通の電卓と同じ感覚で寸法を計算し、そのまま使用する継手を選ぶだけで、選択した口径に応じた継手のZ寸法を自動で加減します。 別の電卓で計算してから数値を入力し直す必要がなく、通常計算から継手の芯引きまで一つの画面で完結します。 ■ こんな手間をなくします ・寸法を測って電卓に入力 ・継手表や別のアプリで芯引き寸法を確認 ・もう一度電卓に戻って差し引く 配管ピタ寸なら「寸法入力 → 継手選択」の2ステップで、芯引き寸法を反映した切り寸がすぐに出ます。 ■ 3種類の配管電卓をひとつに ・ねじ込み配管電卓(白管・ねじ込み継手) ・DV・VU配管電卓(排水配管・DV継手) ・HI・TS配管電卓(給水配管・TS継手) ■ 主な機能 ・普通の電卓と同じ操作で四則演算、√2計算 ・管径を選んで継手をタップするだけでZ寸法を自動加減 ・「適用中」表示で、何を加えた/引いたかがひと目で分かる ・計算途中の口径の取り違えを防ぐ口径ロック ・寸法メモの保存と、計算状態ごとの呼び出し・再編集 ・入り代ℓ、管半径(芯出し)の加減 ・自分の現場の継手を登録できる「マイ継手」 ■ 60日間、全機能を無料でお試しいただけます 「60日間無料で試す」を押すと、3種類の電卓の全機能を60日間無料でお使いいただけます。自動で課金されることはありません。60日を過ぎると、そのまま無料版に戻ります。 各電卓の基本機能(90°エルボ・45°エルボ・チーズ・入り代ℓ・寸法メモなど)は、無料版でもお使いいただけます。 その他の継手やマイ継手などの全機能は、電卓ごと、または3種類まとめての買い切りで解放できます。月額料金はかかりません。 ■ ご利用時の注意 本アプリは切り寸計算を補助するツールです。施工前に、現場寸法・図面・使用する継手のメーカー資料等をご確認ください。継手寸法はメーカー・規格・製品により異なる場合があります。
Screenshots
Verdict
Pipe Offset & Cut Length and 配管ピタ寸 are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.
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. Pipe Offset & Cut Length sells 3 in-app purchases, starting at $2.99 per month and 配管ピタ寸 sells 4 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.
Pipe Offset & Cut Length ships an update every 3 weeks, 配管ピタ寸 every 2 weeks. Both last shipped on November 6, 2026.
| Parameter | Pipe Offset & Cut Length | 配管ピタ寸 |
|---|---|---|
| Price | Free | Free |
| Positive reviews | — | 100.0% of reviews |
| Update frequency | Every 3 weeks | Every 2 weeks — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Devices | iPhone | iPhone |
| Requires iOS | 17.0 | 16.0 — better |
| Further details — not scored | ||
| Size | 11 MB | 7 MB |
| Age rating | 4+ | 4+ |
| Developer | RAINBOW TREE LLC | MKF株式会社 |
In-app purchases
Pipe Offset & Cut Length
- Pipe Offset Pro (Monthly)$2.991 Month
- Pipe Offset Pro (Yearly)$14.991 Year
- Pipe Offset Pro (One-time)$29.99
配管ピタ寸
- ねじ込み配管電卓 全機能$9.99
- DV・VU配管電卓 全機能$9.99
- HI・TS配管電卓 全機能$9.99
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- 3種類まとめて 全機能$19.99





