Comparison

E Sentry Systems vs Carpenter Tools

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

Head to head
About

E Sentry Systems

Features
Read full description

Activate and manage your E Sentry System assets. Users with an NFC compatible device can inspect asset tags to view and submit information, updating its history with the cloud. Activated users can view their assigned routes and designate their current route as needed, showing them which assets require an inspection and cataloging their progress through the route. All check-in information is synched with the cloud service allowing admins to review completed and assigned routes, create new routes, and review inspection history on each asset tag. Historical information is converted into trends and can be exported into an excel compatible document for review and maintenance.

About

Carpenter Tools

This app simplifies carpentry calculations for framing, roofing, stairs, and more. Quickly get accurate measurements and material counts without complex formulas or spreadsheets. Ideal for on-site work, shop use, or estimating.

Highlights
  • Framing calculations
  • Rafter and roof calculations
  • Stair rise and run
  • Material count estimation
  • Imperial and metric units
  • Helpful diagrams
  • Optional cost fields
Features
Read full description

Every answer comes with a drawing. Change the wall length and the studs move on the plate. Change the rise and the stair redraws with its risers, treads and stringer, checked against common code limits. What you measured is in black; what you cut and buy is in red. Type it like you read the tape: feet, inches and fractions on a keypad built for lengths. • Wall framing, rough openings, rake walls, stud layout and square checks • Stairs, common rafters, hips and valleys • Decks, fences, concrete slabs, footings and post holes • Sheathing, drywall and flooring • Baseboard, casing, miters and crown, cabinet boxes, face frames and shelf pins • Tape calculator with memory, cut lists, board feet, triangles, arcs and plan scales Feet and inches, decimal feet or metric, on iPhone and iPad. Share any drawing as a picture with its numbers. Always check your local code before you cut.

Screenshots

E Sentry Systems4 screens
Carpenter Tools4 screens

Verdict

The call

The clearest difference is in-app purchases: E Sentry Systems at none against Carpenter Tools's 1. E Sentry Systems also leads on update cadence (every 3 weeks vs every 6 weeks) and iOS requirement (16.0 vs 18.0). On price, ads 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. Carpenter Tools sells 1 one-off in-app purchase. E Sentry Systems asks for nothing beyond the download.

UpkeepUpdate frequency

E Sentry Systems ships an update every 3 weeks, Carpenter Tools every 6 weeks. The most recent releases landed on October 13, 2026 and October 17, 2026 respectively.

Scorecard3 real differences · 6 level
E Sentry Systems versus Carpenter Tools: the parameters behind the verdict, then further details
ParameterE Sentry SystemsCarpenter Tools
PriceFreeFree
Rating—4.9 (8 ratings) — better
Number of ratings—8 — better
Update frequencyEvery 3 weeks — betterEvery 6 weeks
AdsNoNo
In-app purchasesNo — betterYes
Monetization—Free with in-app purchases
DevicesiPhone, iPadiPhone, iPad
Requires iOS16.0 — better18.0
Further details — not scored
Size54 MB3 MB
Age rating4+4+
DeveloperIRISS IncSergii Nesterenko

In-app purchases

None

E Sentry Systems

No in-app purchases

1 purchases

Carpenter Tools

One-time1
  • Pro Upgrade$12.99

Questions

Is E Sentry Systems free?
E Sentry Systems is free to download, with no in-app purchases.
Is Carpenter Tools free?
Carpenter Tools is free to download, with in-app purchases available.
Do E Sentry Systems or Carpenter Tools have ads?
Neither E Sentry Systems nor Carpenter Tools shows ads.
Which is updated more often, E Sentry Systems or Carpenter Tools?
E Sentry Systems ships an update every 3 weeks, and Carpenter Tools every 6 weeks. Most recently, E Sentry Systems was updated on October 13, 2026 and Carpenter Tools on October 17, 2026.

Other comparisons