Comparison

Summi vs GearTech OS

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

Head to head
About

Summi

Features
Read full description

Still waiting on your immigration case? Summi gives you accurate wait time predictions for your case. Key Features: - Accurate Predictions: Summi uses powerful machine learning models to provide you with an accurate estimate of your wait time. - Private by Design: All predictions are processed on-device to protect your privacy. Upgrade to Summi+ and unlock exclusive benefits: - Day-Accurate Predictions: Get wait time predictions accurate to the day. - Visa Bulletin Notifications: Receive a notification the moment a new visa bulletin is released. If you choose to purchase Summi+, payment will be charged to your Apple account, and your account will be charged for renewal within 24-hours prior to the end of the current period. Auto-renewal may be turned off at any time by going to your settings in the App Store after purchase. Privacy Policy: https://summi-5d48e.web.app/privacy-policy/ Terms of Service: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Summi is not affiliated with the U.S. government and does not provide legal advice.

About

GearTech OS

This app provides specialized calculation tools for various trades, including pipefitting, welding, electrical, and framing. It displays the math behind each result and generates real diagrams of what you're building. Works offline and is ad-free.

Highlights
  • Specialized tools for 10+ trades
  • Detailed math for every calculation
  • Real diagrams of built components
  • Offline functionality
  • Bilingual (English/Spanish)
  • No ads or tracking
Features
Read full description

GearTech OS replaces the box of single-purpose calculators in your truck with one app built for the trades — by someone who works them. Pick your trade and get tools made for it: pipefitting, welding, electrical, framing, concrete, HVAC, plumbing, machining, solar, sheet metal and automotive. No pipe jargon cluttering the electrician's screen, no electrical keys on the welder's — each trade gets its own tools and its own keypad shortcuts. EVERY result shows the math. Tap "Show math" under any answer to see the formula, your numbers plugged in, and the result. Learn it, trust it, and check your work in the field. REAL diagrams. Every tool draws what you're building — a 3D rolling offset box, a butt-weld elbow you can cut to a custom degree, a saddle/fishmouth, a reducer cone, roof rafters, conduit fill, ducts, gears and more. NEW — CRANE HAND SIGNALS IN 3D. 22 ASME B30.5 signals. The signal person gives the signal and the crane performs the motion, with the load always plumb. Spin the camera and watch it from wherever you have to stand. NEW — FLANGE BOLT-UP. Target-stress torque by bolt size, material, lubricant and percentage of yield, with the 30/60/100% passes worked out and the tightening order drawn for 4 to 32 bolts. Built for pipefitters and welders first: - Pipe offsets, rolling offsets, fishmouth/saddle templates, miters, trunnions, reducers (concentric & eccentric), and ASME B16.9 fittings with custom degrees - Spread/line banks, slope/grade, thermal expansion - Crane hand signals in 3D and flange bolt-up torque - Constants cheat-sheet and a 272-question practice EXAM for the NITC / UA STAR, including crane signal person — every question explained step by step, and the app remembers what you missed Plus 100+ tools across 10 more trades: - Electrical: voltage drop, conduit fill (NEC), box fill, ampacity + derating, motor FLC, 3-phase power, stub-up take-up - Framing: rafters, hip/valley/jack, stairs, pitch, baluster spacing, board feet - Concrete: slab/footing/column volume, bags, rebar, blocks - HVAC: tonnage, CFM, duct sizing (round & rect), friction rate, sensible BTU - Plumbing: drain slope, DFU, fixture units to GPM, pipe sizing, gas pipe - Machinist, Solar, Welding, Sheet metal, Automotive Works 100% offline — the 3D included. No account, no ads, no tracking. Your settings, cut lists and memories stay on your phone. Bilingual: English and Spanish, switch anytime. We build the world around us. Our tools should be built for us. — Per Diem Syndicate

Screenshots

Summi3 screens
GearTech OS2 screens

Verdict

The call

The clearest difference is in-app purchases: GearTech OS at none against Summi's 1. GearTech OS also leads on ads (none vs shown) and update cadence (every 5 days vs every 8 months). 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. Summi sells 1 in-app purchase, starting at $0.99 per month. GearTech OS asks for nothing beyond the download.

UpkeepUpdate frequency

Summi ships an update every 8 months, GearTech OS every 5 days. The most recent releases landed on September 11, 2026 and September 24, 2026 respectively.

Scorecard3 real differences · 7 level
Summi versus GearTech OS: the parameters behind the verdict, then further details
ParameterSummiGearTech OS
PriceFreeFree
Rating—5.0 (10 ratings) — better
Positive reviews—100.0% of reviews
Number of ratings—10 — better
Update frequencyEvery 8 monthsEvery 5 days — better
AdsYesNo — better
In-app purchasesYesNo — better
Monetization—Free
DevicesiPhoneiPhone, iPad — better
Requires iOS17.016.0 — better
Further details — not scored
Size4 MB2 MB
Age rating4+4+
Developer敏 周Josue Ponce

Customer experience

Summi

All ratings3 ratings
Positive33.3%
Neutral0.0%
Negative66.7%

GearTech OS

All ratings10 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews10 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

1 purchases

Summi

Subscriptions1
  • Summi+$0.991 Month
None

GearTech OS

No in-app purchases

Questions

Is Summi free?
Summi is free to download, with in-app purchases available.
Is GearTech OS free?
GearTech OS is free to download, with no in-app purchases.
Do Summi or GearTech OS have ads?
Summi shows ads; GearTech OS does not.
Which is updated more often, Summi or GearTech OS?
Summi ships an update every 8 months, and GearTech OS every 5 days. Most recently, Summi was updated on September 11, 2026 and GearTech OS on September 24, 2026.

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