# NumberBondsViz vs DysCalculator

The clearest difference is price: NumberBondsViz at Free against DysCalculator's $9.00. DysCalculator's advantage is update cadence (every 6 weeks vs every 20 months) and chart position (#173 vs unranked). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

NumberBondsViz is free to download; DysCalculator costs $9.00 up front. Neither carries in-app purchases, so what you see is what you pay.

NumberBondsViz ships an update every 20 months, DysCalculator every 6 weeks. The most recent releases landed on November 3, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | NumberBondsViz | DysCalculator |
| --- | --- | --- |
| Price | **Free** | $9.00 |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 20 months | **Every 6 weeks** |
| Best chart rank | — | **#173** |
| Size | 1 MB | 31 MB |
| Requires iOS | **15.0** | 16.4 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [PETER JAMES SIDES](https://appshunter.io/developer/1619752154) | [explainIT NZ Ltd](https://appshunter.io/developer/1831728530) |

## What reviewers say

### NumberBondsViz

[App page](https://appshunter.io/ios/app/numberbondsviz/id1659637462)

**Features:** macOS Compatibility

**In-app purchases:** none


### DysCalculator

[App page](https://appshunter.io/ios/app/dyscalculator/id6749684415)

**Currently charting:** #173 Top Paid · Education (US App Store)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is NumberBondsViz free?

NumberBondsViz is free to download, with no in-app purchases.

### Is DysCalculator free?

DysCalculator costs $9.00, with no in-app purchases.

### Do NumberBondsViz or DysCalculator have ads?

Neither NumberBondsViz nor DysCalculator shows ads.

### Which is updated more often, NumberBondsViz or DysCalculator?

NumberBondsViz ships an update every 20 months, and DysCalculator every 6 weeks. Most recently, NumberBondsViz was updated on November 3, 2026 and DysCalculator on November 5, 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.*