Comparison

Earz Solo vs Speech Jammer

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

Head to head
About

Earz Solo

Learn music theory, note reading, and ear training with interactive lessons and gamified exercises. Explore chords, scales, harmony, and instruments at your own pace. Offers a free demo before purchase.

Highlights
  • Note reading lessons
  • Music theory instruction
  • Ear training for chords and scales
  • Instrument and style recognition
  • Gamified learning experience
  • Harmony and interval training
Features
Read full description

The most comprehensive music lesson app for every level and style. Discover, play and learn with Earz Solo. Game to the music! With Earz Solo you learn what you want:
 • Reading notes • Music Theory Recognizing by ear: • Chords • Harmony • Scales • Intervals • Instruments • Styles • Melody • Rhythm • Measure • Effects • Tones: high/low, long/short, loud/soft You can do a free (24h) demo and then purchase the app. The price of Earz Solo is € 9.99 per year. After each year, the user has the option to renew for another year or to cancel the service. See here for the terms of use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

Speech Jammer

Features
Read full description

Speech Jammer: The Ultimate Delayed Auditory Feedback App Ever tried talking while hearing your own voice with a slight delay? It's surprisingly difficult! Speech Jammer uses the psychological phenomenon of delayed auditory feedback (DAF) to create a unique and entertaining experience. WHAT IS SPEECH JAMMER? Speech Jammer disrupts your speech by playing back your voice with a slight delay through headphones. This delay confuses your brain's speech production system, making it extremely challenging to speak fluently. It's science based fun! KEY FEATURES Real time audio processing with adjustable delay Professional grade audio quality Customizable delay settings for optimal effect Simple, intuitive interface Works with any headphones or earbuds Recording functionality to save your hilarious attempts Perfect for parties, challenges, and social gatherings PERFECT FOR: Party Games: Challenge friends to say tongue twisters Public Speaking Practice: Improve focus and concentration Speech Therapy: Professional DAF therapy applications Entertainment: Hours of fun trying to beat the effect Social Media Content: Create funny challenge videos Education: Demonstrate psychological phenomena HOW IT WORKS The app records your voice through your device's microphone and plays it back through your headphones with a precise delay (typically 100 to 300 milliseconds). This delay interferes with your brain's natural feedback loop for speech, making it difficult to maintain fluent speech. SCIENTIFIC BACKGROUND Delayed Auditory Feedback has been studied extensively in psychology and speech therapy. The effect demonstrates how dependent our speech production is on auditory feedback. It's used professionally in speech therapy and research. EASY TO USE Connect your headphones or earbuds Grant microphone permission Start the jammer Try to speak normally, it's harder than you think! PRIVACY FOCUSED All audio processing happens locally on your device. No data is collected or transmitted. Your recordings stay private and under your control. PERFECT FOR ALL AGES Safe, clean entertainment suitable for everyone. No in app purchases, no subscriptions, just pure fun! Whether you're looking for party entertainment, speech practice tools, or just want to experience this fascinating psychological effect, Speech Jammer delivers an engaging and scientifically interesting experience. Download now and challenge yourself. Can you beat the speech jammer effect? Note: Headphones or earbuds are required for this app to work properly.

Screenshots

Earz Solo4 screens
Speech Jammer3 screens

Verdict

The call

The clearest difference is in-app purchases: Speech Jammer at none against Earz Solo's 1. Speech Jammer also leads on iOS requirement (13.0 vs 15.0). Earz Solo's advantage is update cadence (every 3 weeks vs every 7 months). On price, ads and device support there is nothing between them.

Scored on Price Ā· Rating Ā· Positive reviews Ā· Number of ratings Ā· Update frequency Ā· Ads Ā· In-app purchases Ā· Monetization Ā· Best chart rank Ā· Devices Ā· Requires iOS

CostPrice Ā· In-app purchases Ā· Ads Ā· Monetization

Both are free to download. Earz Solo sells 1 in-app purchase, starting at $8.99 per year. Speech Jammer asks for nothing beyond the download.

UpkeepUpdate frequency

Earz Solo ships an update every 3 weeks, Speech Jammer every 7 months. The most recent releases landed on November 6, 2026 and November 8, 2026 respectively.

Scorecard3 real differences Ā· 5 level
Earz Solo versus Speech Jammer: the parameters behind the verdict, then further details
ParameterEarz SoloSpeech Jammer
PriceFreeFree
Positive reviews50.0% of reviews—
Update frequencyEvery 3 weeks — betterEvery 7 months
AdsNoNo
In-app purchasesYesNo — better
MonetizationSubscription—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.013.0 — better
Further details — not scored
Size6 MB19 MB
Age rating4+4+
DeveloperGer WolthuisWritecream

In-app purchases

1 purchases

Earz Solo

Subscriptions1
  • Earz Solo Yearly$8.991 Year
None

Speech Jammer

No in-app purchases

Questions

Is Earz Solo free?
Earz Solo is free to download, with in-app purchases available.
Is Speech Jammer free?
Speech Jammer is free to download, with no in-app purchases.
Do Earz Solo or Speech Jammer have ads?
Neither Earz Solo nor Speech Jammer shows ads.
Which is updated more often, Earz Solo or Speech Jammer?
Earz Solo ships an update every 3 weeks, and Speech Jammer every 7 months. Most recently, Earz Solo was updated on November 6, 2026 and Speech Jammer on November 8, 2026.

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