Comparison

ダクトサイズ計算Pro vs Ductulator

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

ダクトサイズ計算Pro

Features
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ダクトサイズ計算Proは、空調・換気設備工事で使用するダクトサイズを、風量・風速・本数から簡単に確認できる計算アプリです。 角ダクト、丸ダクトのサイズ確認に対応し、1本から10本までの本数比較、サイズからの風速確認、吹出口面積の確認、目安風速表の確認ができます。 現場での簡易確認、見積・設計補助、施工前のサイズ検討に役立ちます。 主な機能 ・風量から角ダクトサイズを確認 ・風量から丸ダクトサイズを確認 ・ダクト本数を増やした場合の比較 ・H固定時のW自動計算 ・アスペクト比の確認 ・サイズから実風速を確認 ・吹出口面積と吹出風速の確認 ・設計時の目安風速確認 ※本アプリは簡易計算用です。最終設計では、圧力損失、騒音、機外静圧、施工条件、設計図書、関係法令を確認してください。

About

Ductulator

Features
Read full description

Stop guessing duct sizes. Ductulator turns your airflow into the exact round or rectangular duct size you need — plus the friction rate, right from the job site. Built for HVAC contractors and DIY installs alike: • Round and rectangular sizing from CFM and target velocity, fully free • Reverse mode — already have a duct size on hand? See what airflow it can carry (Pro) • Branch calculator — size a trunk and every branch run at once, with a warning if they don't add up (Pro) • Every duct material — Galvanized, Flex Duct, PVC, Fiberboard (Pro) • Save sizings by job and share a polished PDF with your crew (Pro) No account, no ads, no guesswork — just the numbers you need before you cut metal. --- Privacy Policy: https://fosterapps.com/duct/privacy/ Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

ダクトサイズ計算Pro4 screens
Ductulator4 screens

Verdict

The call

The clearest difference is in-app purchases: ダクトサイズ計算Pro at none against Ductulator's 2. ダクトサイズ計算Pro also leads on update cadence (every 2 days vs every 8 days). Ductulator's advantage is ads (none vs shown). On price, device support and iOS requirement 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Ductulator sells 2 in-app purchases, starting at $3.99 per 7 days. ダクトサイズ計算Pro asks for nothing beyond the download.

UpkeepUpdate frequency

ダクトサイズ計算Pro ships an update every 2 days, Ductulator every 8 days. Both last shipped on October 31, 2026.

Scorecard3 real differences · 3 level
ダクトサイズ計算Pro versus Ductulator: the parameters behind the verdict, then further details
Parameterダクトサイズ計算ProDuctulator
PriceFreeFree
Update frequencyEvery 2 days — betterEvery 8 days
AdsYesNo — better
In-app purchasesNo — betterYes
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.115.1
Further details — not scored
Size34 MB29 MB
Age rating4+4+
Developertakesi shutouFoster Apps LLC

In-app purchases

None

ダクトサイズ計算Pro

No in-app purchases

2 purchases

Ductulator

Subscriptions2
  • Pro Weekly3 Days trial$3.997 Days
  • Pro Yearly$19.991 Year

Questions

Is ダクトサイズ計算Pro free?
ダクトサイズ計算Pro is free to download, with no in-app purchases.
Is Ductulator free?
Ductulator is free to download, with in-app purchases available.
Do ダクトサイズ計算Pro or Ductulator have ads?
ダクトサイズ計算Pro shows ads; Ductulator does not.
Which is updated more often, ダクトサイズ計算Pro or Ductulator?
ダクトサイズ計算Pro ships an update every 2 days, and Ductulator every 8 days. Most recently, ダクトサイズ計算Pro was updated on October 31, 2026 and Ductulator on October 31, 2026.

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