# Bond Yield Calculator vs ZapPDF

The clearest difference is price: ZapPDF at Free against Bond Yield Calculator's $0.99. ZapPDF also leads on iOS requirement (17.0 vs 26.0). Bond Yield Calculator's advantage is in-app purchases (none vs 2) and device support (5 vs 3). On update cadence and ads there is nothing between them.

ZapPDF is free to download; Bond Yield Calculator costs $0.99 up front. ZapPDF sells 2 in-app purchases, starting at $8.99 per year. Bond Yield Calculator asks for nothing beyond the download.

Bond Yield Calculator ships an update every 3 months, ZapPDF every 2 months. The most recent releases landed on November 4, 2026 and November 9, 2026 respectively.

## The numbers

| Metric | Bond Yield Calculator | ZapPDF |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/bond-yield-calculator/id6476597484/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 2 months** |
| Monetization | Paid | — |
| Size | 2 MB | 16 MB |
| Requires iOS | 26.0 | **17.0** |
| Devices | **iPhone, iPad, Mac, Apple Watch, Vision Pro** | iPhone, iPad, Mac |
| Age rating | 4+ | 4+ |
| Developer | [Amatino](https://appshunter.io/developer/1664965510) | [Yasar Berker Gungor](https://appshunter.io/developer/1809846909) |

## What reviewers say

### Bond Yield Calculator

[App page](https://appshunter.io/ios/app/bond-yield-calculator/id6476597484)

This utility app calculates and visualizes the yield-to-maturity for bonds. It offers a fast and accurate calculation algorithm with strong input validation and user-friendly controls.

**Highlights:** Yield-to-maturity calculation, Visualization of bond yield, Fast and accurate algorithm, Robust input validation, Convenient controls

**Features:** Apple Watch app

**In-app purchases:** none


### ZapPDF

[App page](https://appshunter.io/ios/app/zappdf-merge-split-and-edit/id6759740507)

**Features:** Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| ZapPDF Pro Annual | $8.99 | per year |
| Lifetime Pro Unlock | $14.99 | one-time |


## Frequently asked questions

### Is Bond Yield Calculator free?

Bond Yield Calculator costs $0.99, with no in-app purchases.

### Is ZapPDF free?

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

### Do Bond Yield Calculator or ZapPDF have ads?

Neither Bond Yield Calculator nor ZapPDF shows ads.

### Which is updated more often, Bond Yield Calculator or ZapPDF?

Bond Yield Calculator ships an update every 3 months, and ZapPDF every 2 months. Most recently, Bond Yield Calculator was updated on November 4, 2026 and ZapPDF on November 9, 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.*