Hypothesis Test vs ReadBay
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- 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
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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
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.
- 15-minute book summaries
- Audiobook summaries
- Offline reading
- Progress tracking
- Habit building challenges
- Bookmark favorite notes
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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
Verdict
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
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.
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.
Hypothesis Test ships an update monthly, ReadBay every 10 days. Both last shipped on November 4, 2026.
| Parameter | Hypothesis Test | ReadBay |
|---|---|---|
| Price | $1.99 | Free — better |
| Rating | 5.0 (1 ratings) — better | 4.8 (239 ratings) |
| Positive reviews | — | 84.5% of reviews |
| Number of ratings | 1 | 239 — better |
| Update frequency | Monthly | Every 10 days — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Paid | Free with in-app purchases — better |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.0 — better | 15.1 |
| Further details — not scored | ||
| Size | 180 MB | 60 MB |
| Age rating | 4+ | 17+ |
| Developer | Glindemann, Sennoun, Langer GbR | Bange Sabastine Hwonyi |
Customer experience
Hypothesis Test
ReadBay
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
Hypothesis Test
No in-app purchases
ReadBay
- Monthly Pro Membership$4.991 Month
- Pro Annual Membership$19.991 Year
- Yearly Pro Membership3 Days trial$24.991 Year
- Lifetime Membership$39.99
Questions
Is Hypothesis Test free?
Is ReadBay free?
Which has better reviews, Hypothesis Test or ReadBay?
Do Hypothesis Test or ReadBay have ads?
Which is updated more often, Hypothesis Test or ReadBay?
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