# Calculator & AI Math Solver vs Therblig

The clearest difference is ads: Therblig at none against Calculator & AI Math Solver's shown. Therblig also leads on update cadence (weekly vs every 5 weeks) and review sentiment (100% vs 83%). Calculator & AI Math Solver's advantage is ratings volume (55 vs 2) and device support (4 vs 1). On price, in-app purchases and monetization model there is nothing between them.

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

Therblig holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: Calculator & AI Math Solver has 55 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 83% of Calculator & AI Math Solver's written reviews are positive against 100% of Therblig's.

Calculator & AI Math Solver ships an update every 5 weeks, Therblig weekly. The most recent releases landed on October 14, 2026 and October 4, 2026 respectively.

## The numbers

| Metric | Calculator & AI Math Solver | Therblig |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.8 (55 ratings)](https://appshunter.io/ios/app/calculator-and-ai-math-solver/id6462117466/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/therblig-time-study/id6792123370/reviews)** |
| Number of ratings | **55** | 2 |
| Positive reviews | 83.3% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 5 weeks | **Weekly** |
| Monetization | Free with in-app purchases | Freemium |
| Size | 87 MB | 2 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPad, iPod, Vision Pro** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [SimpleInnovation LLC](https://appshunter.io/developer/1479770962) | [Marcelo Maldonado](https://appshunter.io/developer/6790241058) |

## What reviewers say

### 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 |


### Therblig

[App page](https://appshunter.io/ios/app/therblig-time-study/id6792123370)

This app is a time study instrument designed for industrial engineers to measure work elements, rate performance, and calculate standard times. It offers a unique cycle dial for real-time pace tracking and robust statistical analysis tools. Data can be exported for further analysis in spreadsheets.

**Highlights:** Continuous method timing, Cycle dial for pace tracking, Out-of-sequence work capture, Statistical analysis and outlier detection, Performance rating with leveling guide, PFD allowance application, CSV data export

**Features:** macOS Compatibility, Family Sharing

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Therblig — Time Study | $39.99 | one-time |


## Frequently asked questions

### Is Calculator & AI Math Solver free?

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

### Is Therblig free?

Therblig is free to download, with in-app purchases available.

### Which has better reviews, Calculator & AI Math Solver or Therblig?

Therblig is rated higher. Calculator & AI Math Solver averages 4.8 out of 5 from 55 ratings, while Therblig averages 5.0 from 2 ratings.

### Do Calculator & AI Math Solver or Therblig have ads?

Calculator & AI Math Solver shows ads; Therblig does not.

### Which is updated more often, Calculator & AI Math Solver or Therblig?

Calculator & AI Math Solver ships an update every 5 weeks, and Therblig weekly. Most recently, Calculator & AI Math Solver was updated on October 14, 2026 and Therblig on October 4, 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.*