# Standard Deviation Calc vs Calculator & AI Math Solver

The clearest difference is review sentiment: Calculator & AI Math Solver at 83% against Standard Deviation Calc's 0%. Calculator & AI Math Solver also leads on rating (4.8 vs 3.7) and update cadence (every 5 weeks vs every 5 months). Standard Deviation Calc's advantage is ads (none vs shown). On price, in-app purchases, monetization model and device support there is nothing between them.

Both are free to download. Standard Deviation Calc sells 1 one-off in-app purchase and Calculator & AI Math Solver sells 6 in-app purchases, starting at $4.89 per 7 days. Whichever you choose, the download price is not the number that matters.

Calculator & AI Math Solver holds the better App Store score, 4.8 against 3.7. That said, the two scores are not equally well evidenced: Calculator & AI Math Solver has 55 ratings behind it against 11, so its average is the more settled of the two. Written reviews point the same way: 0% of Standard Deviation Calc's written reviews are positive against 83% of Calculator & AI Math Solver's.

Standard Deviation Calc ships an update every 5 months, Calculator & AI Math Solver every 5 weeks. The most recent releases landed on October 8, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | Standard Deviation Calc | Calculator & AI Math Solver |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.7 (11 ratings)](https://appshunter.io/ios/app/standard-deviation-calc-sd/id1497525733/reviews) | **[4.8 (55 ratings)](https://appshunter.io/ios/app/calculator-and-ai-math-solver/id6462117466/reviews)** |
| Number of ratings | 11 | **55** |
| Positive reviews | 0.0% of reviews | **83.3% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 5 months | **Every 5 weeks** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 2 MB | 87 MB |
| Requires iOS | **14.0** | 15.0 |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, iPod, Vision Pro** |
| Age rating | 4+ | 4+ |
| Developer | [Phan Nhat Đang](https://appshunter.io/developer/1437390098) | [SimpleInnovation LLC](https://appshunter.io/developer/1479770962) |

## What reviewers say

### Standard Deviation Calc

[App page](https://appshunter.io/ios/app/standard-deviation-calc-sd/id1497525733)

Calculate standard deviation for sample or population data. Input numerical values to find standard deviation, count, sum, mean, variance, and more. Get quick statistical insights with this easy-to-use tool.

**Highlights:** Calculate standard deviation, Sample or population data, Compute mean and variance, Count numerical values, Sum of numbers, List of differences

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove ads | $1.99 | one-time |


### Calculator & AI Math Solver

[App page](https://appshunter.io/ios/app/calculator-and-ai-math-solver/id6462117466)

This app offers a powerful calculator with a history feature and advanced scientific functions. It uses AI to solve complex math problems instantly, including solving equations from photos and through a chat interface.

**Highlights:** Basic and advanced scientific calculations, Solve math problems from photos, AI chat bot for instant solutions, Calculation history, Currency converter, Graphing functions

**Features:** macOS Compatibility, Family Sharing

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Photo Calculator, Math Solver | $4.89 | per 7 days |
| Photo Calculator, Math Solver | $6.99 | per 7 days |
| Scientific & Photo Calculator | $9.09 | per month |
| Scientific & Photo Calculator | $12.99 | per month |
| AI Calc & Math Problem Solver | $34.99 | per year |
| AI Calc & Math Problem Solver | $49.99 | per year |


## Frequently asked questions

### Is Standard Deviation Calc free?

Standard Deviation Calc is free to download, with in-app purchases available.

### Is Calculator & AI Math Solver free?

Calculator & AI Math Solver is free to download, with in-app purchases available.

### Which has better reviews, Standard Deviation Calc or Calculator & AI Math Solver?

Calculator & AI Math Solver is rated higher. Standard Deviation Calc averages 3.7 out of 5 from 11 ratings, while Calculator & AI Math Solver averages 4.8 from 55 ratings.

### Do Standard Deviation Calc or Calculator & AI Math Solver have ads?

Calculator & AI Math Solver shows ads; Standard Deviation Calc does not.

### Which is updated more often, Standard Deviation Calc or Calculator & AI Math Solver?

Standard Deviation Calc ships an update every 5 months, and Calculator & AI Math Solver every 5 weeks. Most recently, Standard Deviation Calc was updated on October 8, 2026 and Calculator & AI Math Solver on October 14, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*