Frame vs Probability
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Frame
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This application is a structural analyzer for educational or prototyping uses. Featured items are flame designer by touching, analyzer by FEM and drawer to PDF. Supported frames are Rahmen structure of Steel or Reinforced Concrete.
Probability
Calculate probabilities, find percentiles, and visualize probability density or mass functions for a wide range of continuous and discrete statistical distributions. Explore common distributions like normal, binomial, Poisson, and many more.
- Compute probabilities
- Determine percentiles
- Plot probability density function
- Plot probability mass function
- Supports 10+ continuous distributions
- Supports 5+ discrete distributions
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Compute probabilities, determine percentiles, and plot the probability density function for the normal (Gaussian), t, chi-square, F, exponential, gamma, beta, log-normal, Pareto, and Weibull distributions. Compute probabilities, approximate percentiles, and plot the probability mass function for the binomial, geometric, hypergeometric, Poisson, and negative binomial distributions.
Screenshots
Verdict
The clearest difference is price: Frame at Free against Probability's $1.99. Frame also leads on iOS requirement (10.0 vs 14.0). Probability's advantage is chart position (#79 vs unranked) and update cadence (every 3 months vs every 6 months). On ads, in-app purchases 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
Frame is free to download; Probability costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Frame ships an update every 6 months, Probability every 3 months. Both last shipped on September 23, 2026.
| Parameter | Frame | Probability |
|---|---|---|
| Price | Free — better | $1.99 |
| Rating | — | 4.9 (193 ratings) — better |
| Positive reviews | — | 97.2% of reviews |
| Number of ratings | — | 193 — better |
| Update frequency | Every 6 months | Every 3 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | — | Free |
| Best chart rank | — | #79 — better |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 10.0 — better | 14.0 |
| Further details — not scored | ||
| Size | 8 MB | 2 MB |
| Age rating | 4+ | 17+ |
| Developer | Tsutomu Murata | Matthew Bognar |
Bugs and requests
Frame
Not enough reviews yet to summarise bugs or requests.
Probability
Requested features
7 requests- Exam mode similar to Geogebra
- Poisson distribution
- Allow setting plot boundaries (e.g., for Beta distribution)
- Make formulae available in offline mode
- Clearly introduce parameters
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- Add options after graph rendering (area above, between, outside values)
- Consistent terms for df across distributions
In-app purchases
Frame
No in-app purchases
Probability
No in-app purchases
Questions
Is Frame free?
Is Probability free?
Do Frame or Probability have ads?
Which is updated more often, Frame or Probability?
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