Comparison

Hypothesis Test vs ReadBay

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

Head to head
About

Hypothesis Test

Perform Type I Error hypothesis testing with customizable null hypotheses and sample sizes. Calculate alpha errors or acceptance/rejection ranges with detailed, step-by-step solutions. Save and share your calculations.

Highlights
  • Type I Error hypothesis testing
  • Calculate alpha error
  • Calculate acceptance/rejection range
  • Right, left, or bilateral tests
  • Step-by-step solution display
  • Calculation history
  • Shareable results
Features
Read full description

This app provides the ability to perform Type I Error hypothesis testing. The null hypothesis and sample size can be specified. Depending on the selected mode, the alpha error or the acceptance or rejection range can be calculated. The different modes offer the possibility of performing right-sided, left-sided or bilateral tests. For this purpose, k1 and/or k2 can be specified for mode I or II. Various modifications can be made to calculate the acceptance and rejection ranges. It is important to note whether X should be greater than/equal to or less than/equal to k. P(X)≤ α is always assumed. The solution is shown step by step. All calculations are saved in history. The final solution can be shared. [ Contents ] - 2 modes to calculate alpha error with right, left or bilateral tests - 4 modes for calculating acceptance and rejection range depending on α - Results are calculated and displayed in detail - History to save input - detailed solution - Natural numbers and decimal numbers are supported depending on the variable - no ads! [ Use ] - There are fields for entering values using a special keyboard - Click on the checkmark button at the bottom right to start the calculation - If values are missing, the corresponding field is highlighted in yellow - If the values are incorrect, the affected field is highlighted in red - a short message explains why a value is incorrect - The entries in the history can be deleted or sorted - When you select an entry in the history, it is automatically loaded for calculation - All history can be deleted at the touch of a button - Solutions can be shared

About

ReadBay

Access concise summaries and audio versions of bestselling books in under 15 minutes. Master key insights from business, self-help, and personal development titles for faster learning and habit building.

Highlights
  • 15-minute book summaries
  • Audiobook summaries
  • Offline reading
  • Progress tracking
  • Habit building challenges
  • Bookmark favorite notes
Features
Read full description

Book Summary & Audiobook App - Learn in 15 Minutes Master key insights from bestselling self help, business books, and personal development titles with ReadBay's quick book summaries! Our speed reading approach delivers professional development content faster than Blinkist or Headway. Why ReadBay Beats the Competition: 15 minute reads - Perfect for daily learning Audiobook summaries for hands-free motivation Offline reading - Learn anywhere, anytime Productivity tools with progress tracking Habit building challenges and goals Popular Categories: Leadership books, Business books, Self Help, Productivity, Psychology, Money & Investing, Professional development, Communication Perfect for Quick Book Summaries: Busy professionals seeking key insights Students wanting speed reading solutions Anyone building daily learning habits Commuters maximizing time with audiobook content Smart Learning Features: Bookmark favorite book notes Set habit building challenges Learn faster with audio mode Motivation through progress tracking Start your learning journey with FREE book summaries! Website: https://www.growthmindapps.com Terms: https://www.growthmindapps.com/terms Privacy: https://www.growthmindapps.com/privacy

Screenshots

Hypothesis Test4 screens
ReadBay4 screens

Verdict

The call

The clearest difference is price: ReadBay at Free against Hypothesis Test's $1.99. ReadBay also leads on ratings volume (239 vs 1) and update cadence (every 10 days vs monthly). Hypothesis Test's advantage is in-app purchases (none vs 4) and rating (5.0 vs 4.8). On ads, 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

ReadBay is free to download; Hypothesis Test costs $1.99 up front. ReadBay sells 4 in-app purchases, starting at $4.99 per month. Hypothesis Test asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Hypothesis Test holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: ReadBay has 239 ratings behind it against 1, so its average is the more settled of the two.

UpkeepUpdate frequency

Hypothesis Test ships an update monthly, ReadBay every 10 days. Both last shipped on November 4, 2026.

Scorecard6 real differences · 4 level
Hypothesis Test versus ReadBay: the parameters behind the verdict, then further details
ParameterHypothesis TestReadBay
Price$1.99Free — better
Rating5.0 (1 ratings) — better4.8 (239 ratings)
Positive reviews—84.5% of reviews
Number of ratings1239 — better
Update frequencyMonthlyEvery 10 days — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationPaidFree with in-app purchases — better
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.0 — better15.1
Further details — not scored
Size180 MB60 MB
Age rating4+17+
DeveloperGlindemann, Sennoun, Langer GbRBange Sabastine Hwonyi

Customer experience

Hypothesis Test

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

ReadBay

All ratings256 ratings
Positive96.1%
Neutral1.6%
Negative2.3%
Written reviews71 reviews
Positive84.5%
Neutral4.2%
Negative11.3%

Bugs and requests

Hypothesis Test

Not enough reviews yet to summarise bugs or requests.

ReadBay

Reported bugs

2 issues
  • Purchased lifetime subscription not accessible on new device
  • Identical summaries for different books

Requested features

3 requests
  • Support for French books
  • Ability to share summaries to Kindle
  • More language options (e.g., Chinese)

In-app purchases

None

Hypothesis Test

No in-app purchases

4 purchases

ReadBay

Subscriptions3
  • Monthly Pro Membership$4.991 Month
  • Pro Annual Membership$19.991 Year
  • Yearly Pro Membership3 Days trial$24.991 Year
One-time1
  • Lifetime Membership$39.99

Questions

Is Hypothesis Test free?
Hypothesis Test costs $1.99, with no in-app purchases.
Is ReadBay free?
ReadBay is free to download, with in-app purchases available.
Which has better reviews, Hypothesis Test or ReadBay?
Hypothesis Test is rated higher. Hypothesis Test averages 5.0 out of 5 from 1 ratings, while ReadBay averages 4.8 from 239 ratings.
Do Hypothesis Test or ReadBay have ads?
Neither Hypothesis Test nor ReadBay shows ads.
Which is updated more often, Hypothesis Test or ReadBay?
Hypothesis Test ships an update monthly, and ReadBay every 10 days. Most recently, Hypothesis Test was updated on November 4, 2026 and ReadBay on November 4, 2026.

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