Comparison

Rebar Calc vs Evap Solutions

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

Head to head
About

Rebar Calc

This app simplifies concrete and rebar calculations for construction projects. It helps estimate rebar tonnage, mesh quantities, and concrete volume, and can even provide quotes for materials.

Highlights
  • Rebar tonnage calculation
  • Sheet and roll mesh estimation
  • Concrete volume estimator
  • Material quote generation
  • Adjustable lap amount
  • Configurable rebar/mesh size
Features
Read full description

Rebar Calc is your all-in-one solution for rebar and concrete calculations. Whether you need to determine the tons and linear feet of rebar, sheets of sheet mesh, or rolls of roll mesh required for your concrete project, Rebar Calc has you covered. Tailor your calculations by configuring the necessary lap amount, and selecting the size of rebar, sheet mesh, or roll mesh to suit your specific needs. Rebar Calc also features a fast and easy concrete volume estimator in cubic yards. Quickly figure out how many bags of grout, fast-setting concrete, and other materials you'll need for slabs or concrete cores. Plus, with just a tap, you can get a quote on rebar, mesh, and other concrete supplies. Simplify your construction planning with Rebar Calc, the essential tool for every concrete job. These calculations are for estimating purposes only. All final figures should be verified by a professional before quoting, purchasing, or installing materials.

About

Evap Solutions

This app helps concrete professionals calculate evaporation rates based on weather conditions. It provides guidance to prevent cracks and improve concrete curing for stronger, longer-lasting results. A free trial is available before subscribing.

Highlights
  • Concrete evaporation rate calculation
  • Crack prevention guidance
  • Weather-based adjustments
  • User-friendly interface
  • Moisture control and curing management
Read full description

Evap Solutions – Concrete Evaporation Calculator Helps to detect possibility of shrinkage cracks and crazing with accurate, real-time evaporation rate calculations. Evap Solutions is built for contractors, concrete finishers, and engineers who need fast, reliable data to manage curing conditions and protect concrete quality. Free Trial & Subscription Start with a 7-day free trial with full access to all features. After the trial, continue with an annual subscription. $39.99/year — cancel anytime (at least 24 hours before renewal). Key Features • Imperial & Metric Units Seamlessly switch between unit systems for U.S. and international projects. • Concrete Evaporation Calculator Quickly calculate evaporation rate (surface moisture loss) to guide finishing timing. • Real-Time Weather Data Uses live temperature, wind speed, and humidity for accurate results. • Crack Prevention Helps determine the possibility of plastic shrinkage cracking, crazing, and surface defects. • Fast, Simple Input Enter concrete temperature and get results instantly—no manual formulas needed. • Built for the Field Designed for concrete professionals, job sites, and field use. Evap Solutions helps with: • Concrete curing management • Moisture control • Evaporation rate monitoring • Finishing timing decisions Deliver stronger, more durable concrete while avoiding costly rework. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://www.1lconcretesolutions.com/private-policy

Screenshots

Rebar Calc4 screens
Evap Solutions4 screens

Verdict

The call

Rebar Calc and Evap Solutions both sit at 4.9 stars, but that hides the real split: 100% of Evap Solutions's written reviews are positive against 60% of Rebar Calc's. Evap Solutions also leads on ads (none vs shown) and update cadence (every 3 weeks vs every 2 months). Rebar Calc's advantage is in-app purchases (none vs 2) and ratings volume (644 vs 2). On price, rating, 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. Evap Solutions sells 2 in-app purchases, starting at $9.99 per month. Rebar Calc asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.9 for Rebar Calc against 5.0 for Evap Solutions. That said, the two scores are not equally well evidenced: Rebar Calc has 644 ratings behind it against 2, so its average is the more settled of the two. Written reviews are what separate them: 60% of Rebar Calc's written reviews are positive against 100% of Evap Solutions's.

UpkeepUpdate frequency

Rebar Calc ships an update every 2 months, Evap Solutions every 3 weeks. The most recent releases landed on October 29, 2026 and October 18, 2026 respectively.

Scorecard6 real differences · 4 level
Rebar Calc versus Evap Solutions: the parameters behind the verdict, then further details
ParameterRebar CalcEvap Solutions
PriceFreeFree
Rating4.9 (644 ratings)5.0 (2 ratings) — better
Positive reviews60.0% of reviews100.0% of reviews — better
Number of ratings644 — better2
Update frequencyEvery 2 monthsEvery 3 weeks — better
AdsYesNo — better
In-app purchasesNo — betterYes
MonetizationAd-supported — betterSubscription
DevicesiPhone, iPad — betteriPhone
Requires iOS18.017.6 — better
Further details — not scored
Size13 MB25 MB
Age rating4+17+
DeveloperAppco LLC (USA)1L Concrete Solutions

Customer experience

Rebar Calc

All ratings637 ratings
Positive96.9%
Neutral1.6%
Negative1.6%
Written reviews5 reviews
Positive60.0%
Neutral0.0%
Negative40.0%

Evap Solutions

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews2 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Rebar Calc

No in-app purchases

2 purchases

Evap Solutions

Subscriptions2
  • Monthly Subscription$9.991 Month
  • Annual Subscription7 Days trial$39.991 Year

Questions

Is Rebar Calc free?
Rebar Calc is free to download, with no in-app purchases.
Is Evap Solutions free?
Evap Solutions is free to download, with in-app purchases available.
Which has better reviews, Rebar Calc or Evap Solutions?
Evap Solutions is rated higher. Rebar Calc averages 4.9 out of 5 from 644 ratings, while Evap Solutions averages 5.0 from 2 ratings.
Do Rebar Calc or Evap Solutions have ads?
Rebar Calc shows ads; Evap Solutions does not.
Which is updated more often, Rebar Calc or Evap Solutions?
Rebar Calc ships an update every 2 months, and Evap Solutions every 3 weeks. Most recently, Rebar Calc was updated on October 29, 2026 and Evap Solutions on October 18, 2026.

Other comparisons