Comparison

Algebra I Quick Reference vs NMR Calculator 2

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

Head to head
About

Algebra I Quick Reference

Features
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Algebra I Quick Reference is a basic information tool for Algebra I students. It provides a simple way to access and review the basic concepts of Algebra I. Here are a few of the ways you will use Algebra I Quick Reference everyday with your students: • Use Algebra I Quick Reference as an informational tool to help students understand and review basic concepts of Algebra I, including the distributive, commutative and associative properties of real numbers, basic techniques for solving equations, rules for exponents, graphing linear functions and factoring. •Tap the areas of the screen to bring up more detailed information and explanations about essential algebra concepts. •Tap to get more information about key topics including variables and expressions, properties of real numbers, solving equations, polynomials, factoring and graphing linear functions. An Interactive Quick Reference Tool Many of the areas of the screen are hot spots. Tap terms and icons to bring up more information about each topic. Topics include: •Variables and Expressions •Properties of Real Numbers •Solving Equations •Polynomials •Factoring and •Graphing Linear Functions

About

NMR Calculator 2

Features
Read full description

The app shows a list of isotopes with non-zero nuclear spin angular momentum. Select an isotope to view its NMR properties and calculate fundamental NMR parameters. Information section For a chosen isotope, this section displays the atomic symbol with mass number, nuclear spin angular momentum, gyromagnetic ratio, and natural abundance. Calculator section Update any one parameter in a subsection to recalculate the others. - Larmor frequencies: External magnetic field and the corresponding Larmor frequencies for the chosen isotope, the proton, and the free electron. - Time domain: Number of data points, acquisition duration, and dwell time. - Frequency domain: Number of data points, spectral width, and frequency resolution. - Pulse 1: Pulse duration, flip angle, and RF amplitude in Hz and μT. - Pulse 2: Pulse duration, flip angle, RF amplitude in Hz, and RF power relative to Pulse 1. - Ernst angle: Ernst angle and repetition time for a given T₁ relaxation time. NMR Assistant An on-device AI assistant scoped to NMR topics, available where Apple Intelligence is supported. Ask questions in plain language — the assistant answers using the same calculation engine that powers the calculator, so results are always physically consistent.

Verdict

The call

The clearest difference is price: NMR Calculator 2 at Free against Algebra I Quick Reference's $0.99. NMR Calculator 2 also leads on device support (3 vs 1). Algebra I Quick Reference's advantage is iOS requirement (12.0 vs 26.0). On update cadence, ads and in-app purchases 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

NMR Calculator 2 is free to download; Algebra I Quick Reference costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Algebra I Quick Reference ships an update every 36 months, NMR Calculator 2 every 33 months. The most recent releases landed on October 6, 2026 and September 27, 2026 respectively.

Scorecard3 real differences · 3 level
Algebra I Quick Reference versus NMR Calculator 2: the parameters behind the verdict, then further details
ParameterAlgebra I Quick ReferenceNMR Calculator 2
Price$0.99Free — better
Update frequencyEvery 36 monthsEvery 33 months — better
AdsNoNo
In-app purchasesNoNo
DevicesiPadiPhone, iPad, Apple Watch — better
Requires iOS12.0 — better26.0
Further details — not scored
Size4 MB2 MB
Age rating4+4+
DeveloperVentura Educational SystemsJae-Seung Lee

In-app purchases

None

Algebra I Quick Reference

No in-app purchases

None

NMR Calculator 2

No in-app purchases

Questions

Is Algebra I Quick Reference free?
Algebra I Quick Reference costs $0.99, with no in-app purchases.
Is NMR Calculator 2 free?
NMR Calculator 2 is free to download, with no in-app purchases.
Do Algebra I Quick Reference or NMR Calculator 2 have ads?
Neither Algebra I Quick Reference nor NMR Calculator 2 shows ads.
Which is updated more often, Algebra I Quick Reference or NMR Calculator 2?
Algebra I Quick Reference ships an update every 36 months, and NMR Calculator 2 every 33 months. Most recently, Algebra I Quick Reference was updated on October 6, 2026 and NMR Calculator 2 on September 27, 2026.

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