Comparison

OPW Inspection Request vs DropTubeBuilder

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

Head to head
About

OPW Inspection Request

Features
Read full description

OPW (Oakland of Public Works) Inspection Request app allows contractors and homeowners to request inspections on their permits with just a few clicks.   Key features include: * View list of all your permits in one place. * Review inspection history for any permit. * Request single or multiple inspections with a few clicks. * Auto-integrate inspections with the calendar and add alerts. * Reschedule or cancel inspection in seconds. * Fast, easy, and time-saving.

About

DropTubeBuilder

This tool simplifies fuel system measurements for technicians. It offers accurate drop tube calculations, supports precise fill levels, and provides a reference for dispenser error codes. Streamline your work and ensure regulatory compliance in the field.

Highlights
  • Accurate drop tube length calculations
  • 95% fill level support
  • Tank volume chart builder
  • Dispenser error code reference
  • User-friendly field interface
Features
Read full description

DropTubeBuilder is the offline field tool for fuel system technicians who work dispenser, tank monitor and pump alarms, cut overfill drop tubes, and build tank charts on site. Everything works with no signal, because the pit does not have any. DROP TUBE CUT MATH Enter the measurements and get the cut length that puts the overfill valve at the 95 percent regulatory fill level. Supports Franklin Defender, EMCO, and OPW ISO valves, with the seat to bottom, tank height and riser measurements each handled properly. Upper cut, lower cut and total length come back with the shutoff height so you can check the result before you cut anything. TANK CHART BUILDER Build a volume chart in eighth inch increments for any tank, and export it as a PDF you can leave on site or file. Built in instructions walk through fitting the chart to a real tank, including why the 95 and 90 percent overfill heights follow the tank diameter alone and hold steady when the length changes. ERROR CODES Nearly 600 codes covering Gilbarco Encore 300, 500S and 700S, Wayne Ovation, Veeder-Root TLS-300, TLS-350, TLS-450, TLS-450 PLUS and TLS4, and Franklin INCON EVO 550 and 5000. Tap any code and you get what it actually means, then an ordered list of what to check, most likely cause first, so you can work the alarm instead of just reading it back. Line test failures start with the programming that causes most false failures. Console faults tell you when the alarm is an audit entry rather than a fault. Where an alarm carries a compliance consequence, that is stated after the repair steps, not instead of them. Searchable, fully offline, and written to be verified against the manufacturer service manual rather than to replace it. PUMP CONTROLLERS Fault codes, status codes, DIP switch settings and calibration notes for FE Petro MagVFC and Guardian SPGC 220 controllers. EPD THREE YEAR INSPECTION Work the inspection criterion by criterion and get a clear pass or fail, then export a signed PDF record. The footer reminds you to keep the record copy for three years, because that is the part people forget. MEASUREMENT HISTORY Every calculation is saved with its site name, so last year's job is there when you go back. Re export any past calculation as a PDF. BUILT FOR THE FIELD Everything ships inside the app. No account, no login, no server, no advertising, and nothing collected about you or your sites. It works in a tank pit with no bars. Available in English, Spanish, French, German, Hindi and Chinese. SUBSCRIPTION DropTubeBuilder Pro is $4.99 a month or $24.99 a year. The yearly plan starts with a 3 day free trial with full access. Payment is charged to your Apple Account at confirmation of purchase. Subscriptions renew automatically unless cancelled at least 24 hours before the end of the current period, and the account is charged for renewal within 24 hours before the period ends. Manage or cancel any time in your Apple Account settings. Any unused part of a free trial ends when you buy a subscription. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ DropTubeBuilder Terms: https://thrasherapps.com/droptubebuilder/terms.html Privacy Policy: https://thrasherapps.com/droptubebuilder/privacy.html Support: https://thrasherapps.com/droptubebuilder/support.html

Screenshots

OPW Inspection Request4 screens
DropTubeBuilder4 screens

Verdict

The call

The clearest difference is in-app purchases: OPW Inspection Request at none against DropTubeBuilder's 2. DropTubeBuilder's advantage is update cadence (every 3 weeks vs every 2 months). On price, ads, 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. DropTubeBuilder sells 2 in-app purchases, starting at $4.99 per month. OPW Inspection Request asks for nothing beyond the download.

UpkeepUpdate frequency

OPW Inspection Request ships an update every 2 months, DropTubeBuilder every 3 weeks. The most recent releases landed on November 3, 2026 and November 4, 2026 respectively.

Scorecard2 real differences · 8 level
OPW Inspection Request versus DropTubeBuilder: the parameters behind the verdict, then further details
ParameterOPW Inspection RequestDropTubeBuilder
PriceFreeFree
Rating—5.0 (6 ratings) — better
Positive reviews—100.0% of reviews
Number of ratings—6 — better
Update frequencyEvery 2 monthsEvery 3 weeks — better
AdsNoNo
In-app purchasesNo — betterYes
Monetization—Free with in-app purchases
DevicesiPhone, iPodiPhone, iPad
Requires iOS15.0 — better16.6
Further details — not scored
Size53 MB2 MB
Age rating4+4+
DeveloperCity of OaklandChris Thrasher

In-app purchases

None

OPW Inspection Request

No in-app purchases

2 purchases

DropTubeBuilder

Subscriptions2
  • DropTubeBuilder Pro monthly$4.991 Month
  • DropTube Pro Annual3 Days trial$24.991 Year

Questions

Is OPW Inspection Request free?
OPW Inspection Request is free to download, with no in-app purchases.
Is DropTubeBuilder free?
DropTubeBuilder is free to download, with in-app purchases available.
Do OPW Inspection Request or DropTubeBuilder have ads?
Neither OPW Inspection Request nor DropTubeBuilder shows ads.
Which is updated more often, OPW Inspection Request or DropTubeBuilder?
OPW Inspection Request ships an update every 2 months, and DropTubeBuilder every 3 weeks. Most recently, OPW Inspection Request was updated on November 3, 2026 and DropTubeBuilder on November 4, 2026.

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