Comparison

Simple Logarithm PRO vs Lexify™ Play 'n Read

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

Head to head
About

Simple Logarithm PRO

This app simplifies complex logarithm and exponentiation calculations with step-by-step solutions. It supports various input types, including decimals, fractions, and negative values, and provides a history of all calculations.

Highlights
  • Logarithm and exponentiation modes
  • Step-by-step solution display
  • Support for decimals, fractions, and negative values
  • Calculation history
  • Transformation between logarithm and exponentiation
  • Logarithm rules infographic
  • Solution sharing
Features
Read full description

Using logarithm is a complicated task, but this app helps out! You can choose between 4 standard shapes of this topic. Then you can enter what you have to calculate what you need - base, exponent, antilogarithm, the logarithmic result, even the x-value of a term as exponent. The connection between logarithm and exponentiation is shown aswell. An infographic gives a deeper insight into some calculation rules of the logarithm. Decimals, fractions and negative values are supported. The solution is shown step by step. All calculations are stored in the history. The final solution can be shared. [ Contents ] - modes for logarithm - modes for exponentiation - exponent, base and some more values can be entered - results are calculated and shown in detail - transformations between logarithm and exponentiation are taken into account - shortened list of logarithm rules - history function to save the input - detailed solution - negative values, decimal numbers and fractions are supported - no ads! [ Usage ] - there are fields for entering values using a special keyboard - press the check mark button at the bottom right to start the calculation - if values are missing, the relevant field is highlighted in yellow - if the values are wrong, the affected field will be highlighted in red - the entries in the history can be deleted or sorted - if you select an entry in the history, it will be automatically loaded for the calculation - the whole history can be deleted by pressing a button - solutions can be shared - touching the question mark button displays information about the topic

About

Lexify™ Play 'n Read

This app helps emergent and dyslexic readers build foundational phonemic awareness skills through engaging gameplay. It offers 8 levels of interactive activities designed by literacy specialists to improve listening skills and sound manipulation, crucial for reading and spelling.

Highlights
  • 8 levels of phonemic awareness skill-building
  • Interactive games and instructional videos
  • Skill-based progression
  • Critical listening skill development
  • Progress tracking
  • Designed by literacy specialists
Features
Read full description

Reading practice that feels like play. Meet LexifyLaunch — the gamified way to build phonemic awareness, one sound at a time. Designed for emerging readers and kids who learn differently (including dyslexic readers), LexifyLaunch turns tricky reading-readiness skills into a game your child actually wants to play. No worksheets. No pressure. Just short, playful challenges that build the sound skills real reading is built on. Why kids (and parents) love it: Bite-sized games that build listening, blending, and sound-matching skills Built on phonemic awareness — the research-backed foundation for learning to read Level up through 8 stages, unlocking new challenges as skills grow Friendly, encouraging design made for emerging and dyslexic readers Progress tracked automatically, so kids (and grown-ups) can see how far they've come Whether your child is just starting their reading journey or needs extra support hearing and playing with sounds, LexifyLaunch makes practice feel like a win every time. Small steps. Big sounds. Real progress. There are no in-app purchases. This is a one-time purchase for forever access. No recurring subscriptions.

Screenshots

Simple Logarithm PRO4 screens
Lexify™ Play 'n Read4 screens

Verdict

The call

The clearest difference is in-app purchases: Simple Logarithm PRO at none against Lexify™ Play 'n Read's 1. Simple Logarithm PRO also leads on price ($1.99 vs $4.99). Lexify™ Play 'n Read's advantage is update cadence (every 3 days vs monthly). On ads, monetization model, 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

Simple Logarithm PRO costs $1.99 and Lexify™ Play 'n Read $4.99 up front. Lexify™ Play 'n Read sells 1 one-off in-app purchase. Simple Logarithm PRO asks for nothing beyond the download.

UpkeepUpdate frequency

Simple Logarithm PRO ships an update monthly, Lexify™ Play 'n Read every 3 days. The most recent releases landed on October 2, 2026 and October 6, 2026 respectively.

Scorecard3 real differences · 7 level
Simple Logarithm PRO versus Lexify™ Play 'n Read: the parameters behind the verdict, then further details
ParameterSimple Logarithm PROLexify™ Play 'n Read
Price$1.99 — better$4.99
Rating—5.0 (1 ratings) — better
Positive reviews0.0% of reviews—
Number of ratings—1 — better
Update frequencyMonthlyEvery 3 days — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationPaidPaid
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.0 — better15.6
Further details — not scored
Size180 MB35 MB
Age rating4+4+
DeveloperGlindemann, Sennoun, Langer GbRCreation Fitness

Customer experience

Simple Logarithm PRO

Written reviews1 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

Lexify™ Play 'n Read

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Simple Logarithm PRO

No in-app purchases

1 purchases

Lexify™ Play 'n Read

One-time1
  • Lexify™ Play 'n Read$9.99

Questions

Is Simple Logarithm PRO free?
Simple Logarithm PRO costs $1.99, with no in-app purchases.
Is Lexify™ Play 'n Read free?
Lexify™ Play 'n Read costs $4.99, and also offers in-app purchases.
Do Simple Logarithm PRO or Lexify™ Play 'n Read have ads?
Neither Simple Logarithm PRO nor Lexify™ Play 'n Read shows ads.
Which is updated more often, Simple Logarithm PRO or Lexify™ Play 'n Read?
Simple Logarithm PRO ships an update monthly, and Lexify™ Play 'n Read every 3 days. Most recently, Simple Logarithm PRO was updated on October 2, 2026 and Lexify™ Play 'n Read on October 6, 2026.

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