Comparison

Tri vs WeldUp Pocket

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

Head to head
About

Tri

This utility app provides the formula and value for calculating triangle properties. It's designed for quick access to mathematical formulas related to triangles.

Highlights
  • Triangle formula display
  • Value calculation
  • Quick access utility
  • Mathematical formulas
Features
Read full description

App to display a formula and value of a triangle.

About

WeldUp Pocket

This app provides a comprehensive suite of tools for pipefitters, welders, and fabricators. It offers calculations for offsets, tube bending, welding settings, and material specifications, all accessible offline. Designed for practical use in the field, it helps streamline complex calculations and job management.

Highlights
  • Offline functionality
  • Pipefitting calculations (offset, bending, templates)
  • Welding settings and distortion analysis
  • Fabrication development tools
  • Material specification and traceability
  • Job management and export
  • Customizable interface for gloved hands
Features
Read full description

Pipefitting, welding and fabrication calculator. Works fully offline. WeldUp Pocket gathers what a pipefitter, a welder and a fabricator have always worked out in their head or on a scrap of cardboard: the offset, the flat pattern, the saddle, the machine settings. Fifty tools, one entry, one answer. Nothing to look up, nothing to wait for. EVERYTHING WORKS OFFLINE Under a vessel, in a trench, up in the steel: the app never asks for a signal. No account, no ads, no data leaving the phone. PIPEFITTER • Offsets — one menu for every shape: offset, rolling offset (3D), single elbow, cut elbows • Tube bending — where to mark, how much to cut, what the wall takes • Pipe branch template, elbow branch template, swept tee — the saddle wrap, printed at full scale • Iso sketch — draw the run first, dimension it after, get the pipe takeoff and the spool pieces, and export the drawing as a PDF • My ISO plans — save a drawing under a name, reopen it and keep editing • Pipe bank & flag — several lines on one route, the cut list line by line • Custom elbow — the take-out of an elbow cut to an angle the catalog does not carry • Custom reducer — where to cut a stock reducer for the size you are missing • Accessory library — a valve's face-to-face measured once, dropped onto the drawing in one tap • Hydrostatic test, test records — test pressure, the gauge to use, a log of tests with photos • Line weight — pipe, water, insulation • Level — slope and plumb, two full-screen vials, zeroed on the spot WELDER • Amperage settings — process, material, thickness, joint and position: a 10 A window to dial into the machine • Weld shrinkage — shrinkage, angular pull, the gap to build in before you weld instead of fighting it after • Gas selection — mix, ISO 14175 class, cylinder color • Flow and purge — flow rate, time, chamber volume • Weld spacing — intermittent welds laid out ahead • Weld traceability — a record for every weld, filed by job • Metallurgical compatibility and weld defect diagnostics • Torch components — TIG and MIG diagrams, tap any part FABRICATOR • Bend, cone, shell course and hopper development — the profile drawn bend by bend, the drawing as a PDF • Frame drawing, cutting optimisation — sketched with a finger, miter angles, bars and sheets with the least waste • Bump bending, element lines, trigonometry — press, layout, squaring • Neutral axis, joint allowances, weight, check circumference • Drilling and tapping — speed, feed, pilot hole, and the drill to pick for any M size REFERENCES • Material specification — which diameter, which wall, which grade for which job, with the loads to put a number on it • Material traceability — the camera reads the pipe marking (grade, heat number, lot) and files it under the open job • Flange gasket — start from the fluid, not the gasket: first choice, fallbacks, the traps that cost • Flange bolting — how many bolts, what diameter, what length, what wrench: EN 1092-1 and ASME B16.5 • Section weight — square tube, angle, flat, round • Grades, weld and piping symbols, polarity, fitting dimensions, unit converter BUILT AROUND THE JOB Open a job: everything calculated after that hangs off it. History reopens each tool with its values, and a whole job goes out in a single message — text, mail, chat. MADE FOR WORKING HANDS A keypad sized for a gloved finger, with the fraction bar. Light theme readable in full sun, dark in the shop. Imperial or metric: inches to the sixteenth, a dimension types as "3 1/2", the way it reads on the print. IN SIX LANGUAGES English, French, Spanish, German, Italian, Polish. HONEST ABOUT WHAT IT IS The values are indicative. They replace neither the applicable codes (ASME, AWS) nor a qualified WPS — they save the ten minutes between the question and the answer. And every result shows where its number comes from. Made by a welder, for the people who set the steel.

Screenshots

Tri4 screens
WeldUp Pocket4 screens

Verdict

The call

The clearest difference is ads: WeldUp Pocket at none against Tri's shown. WeldUp Pocket also leads on update cadence (every 10 days vs every 12 months) and monetization model (free vs ad-supported). On price, review sentiment, in-app purchases and device support 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. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Tri ships an update every 12 months, WeldUp Pocket every 10 days. The most recent releases landed on October 3, 2026 and October 15, 2026 respectively.

Scorecard3 real differences · 7 level
Tri versus WeldUp Pocket: the parameters behind the verdict, then further details
ParameterTriWeldUp Pocket
PriceFreeFree
Rating5.0 (1 ratings) — better—
Positive reviews100.0% of reviews100.0% of reviews
Number of ratings1 — better—
Update frequencyEvery 12 monthsEvery 10 days — better
AdsYesNo — better
In-app purchasesNoNo
MonetizationAd-supportedFree — better
DevicesiPhone, iPodiPhone, iPad, iPod — better
Requires iOS15.615.5 — better
Further details — not scored
Size4 MB63 MB
Age rating4+4+
DeveloperThirdware.jpLison Robin

Customer experience

Tri

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews4 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

WeldUp Pocket

Written reviews13 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Tri

No in-app purchases

None

WeldUp Pocket

No in-app purchases

Questions

Is Tri free?
Tri is free to download, with no in-app purchases.
Is WeldUp Pocket free?
WeldUp Pocket is free to download, with no in-app purchases.
Do Tri or WeldUp Pocket have ads?
Tri shows ads; WeldUp Pocket does not.
Which is updated more often, Tri or WeldUp Pocket?
Tri ships an update every 12 months, and WeldUp Pocket every 10 days. Most recently, Tri was updated on October 3, 2026 and WeldUp Pocket on October 15, 2026.

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