Comparison

Digit Whisper vs pH Lab

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

Head to head
About

Digit Whisper

Master number recognition in multiple languages through engaging, bite-sized gameplay. See a number word and tap the correct digits on a custom keypad. Track your progress and build streaks in a distraction-free environment.

Highlights
  • Multilingual number recognition
  • Custom number pad input
  • Progressive difficulty levels
  • Streak and accuracy tracking
  • Distraction-free interface
  • Offline play
Features
Read full description

Learn to recognize numbers in multiple languages — the fun way! DigitWhisper helps you master number recognition in German, Russian, and English through addictive, bite-sized gameplay. See a number word, tap the correct digits. It's that simple — but surprisingly challenging! HOW IT WORKS A random number appears as a word (e.g., "siebenundvierzig") Use the custom keypad to enter the digits (47) Get instant feedback and build your streak Progress through increasingly difficult levels FEATURES Three languages: German, Russian, English Custom number pad optimized for quick input Progressive difficulty levels from 0-100+ Track your streaks and accuracy Clean, distraction-free interface No ads, no subscriptions—just pure learning Works offline—practice anywhere, anytime Light and dark mode support PERFECT FOR Language learners building vocabulary Students practicing number recognition Travelers preparing for trips abroad Anyone wanting to sharpen their multilingual skills Parents teaching children numbers in different languages WHY DIGITWHISPER? Numbers are the foundation of any language, but they're often overlooked in traditional learning apps. DigitWhisper makes number recognition second nature through spaced repetition and active recall—proven learning techniques wrapped in engaging gameplay. Whether you're ordering coffee in Berlin, shopping in Moscow, or just expanding your mind, DigitWhisper gives you the confidence to understand numbers instantly in any language. Start your journey to multilingual number fluency today! Download DigitWhisper and transform those confusing number words into instant recognition.

About

pH Lab

Features
Read full description

pH Lab is an interactive virtual chemistry lab for iPhone and iPad that helps you understand acids, bases, and the pH scale through hands-on simulation. Key Features • Real-time pH Simulator: Select chemicals, adjust concentration and volume, and mix solutions to see pH updates instantly. • Visual pH Feedback: Watch indicator-like color changes and follow a full 0–14 pH scale. • Beginner + Advanced Modes: Start simple, then explore deeper with more calculation-focused learning. • Structured Lessons: Learn from core pH concepts to neutralization, buffers, and real-world applications. • Quizzes with Explanations: Test your understanding and review clear answer explanations. • Daily & Advanced Challenges: Complete targets, earn stars, and build your chemistry streak. • Substance Library: Browse chemicals with formulas, pH values, use cases, and safety notes. Great For • Middle school, high school, and university students • Science teachers and tutors • Self-learners who want a visual, interactive way to study chemistry Premium (One-Time Purchase) • Unlock all chemicals • Unlock all lessons, quizzes, and challenges • Access titration mode and saved experiments • Remove all ads Disclaimer: pH Lab is an educational tool and is not a substitute for real laboratory safety training.` - What’s New (v1.0): `Welcome to pH Lab 1.0! • Launch of the interactive pH simulation lab • Added lessons, quizzes, and daily challenges • Introduced one-time Premium unlock for all features

Screenshots

Digit Whisper4 screens
pH Lab4 screens

Verdict

The call

The clearest difference is in-app purchases: Digit Whisper at none against pH Lab's 1. Digit Whisper also leads on ads (none vs shown) and iOS requirement (18.0 vs 26.0). On price 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. pH Lab sells 1 one-off in-app purchase. Digit Whisper asks for nothing beyond the download.

Scorecard3 real differences · 6 level
Digit Whisper versus pH Lab: the parameters behind the verdict, then further details
ParameterDigit WhisperpH Lab
PriceFreeFree
Rating5.0 (1 ratings) — better—
Number of ratings1 — better—
Update frequencyEvery 2 days—
AdsNo — betterYes
In-app purchasesNo — betterYes
MonetizationFree—
DevicesiPhoneiPhone, iPad — better
Requires iOS18.0 — better26.0
Further details — not scored
Size5 MB14 MB
Age rating4+4+
DeveloperFarkhod YuldashevChatStick Company Limited

In-app purchases

None

Digit Whisper

No in-app purchases

1 purchases

pH Lab

One-time1
  • Unlock All Features$2.99

Questions

Is Digit Whisper free?
Digit Whisper is free to download, with no in-app purchases.
Is pH Lab free?
pH Lab is free to download, with in-app purchases available.
Do Digit Whisper or pH Lab have ads?
pH Lab shows ads; Digit Whisper does not.

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