# Timer 555 Calculator Pro vs Loan Calculator Plus

The clearest difference is review sentiment: Timer 555 Calculator Pro at 100% against Loan Calculator Plus's 67%. Loan Calculator Plus's advantage is update cadence (every 3 days vs every 3 months). On price, ads, in-app purchases and monetization model there is nothing between them.

Timer 555 Calculator Pro costs $0.99 and Loan Calculator Plus $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Timer 555 Calculator Pro ships an update every 3 months, Loan Calculator Plus every 3 days. The most recent releases landed on October 23, 2026 and October 4, 2026 respectively.

## The numbers

| Metric | Timer 555 Calculator Pro | Loan Calculator Plus |
| --- | --- | --- |
| Price | $0.99 | $0.99 |
| Rating | **[4.7 (3 ratings)](https://appshunter.io/ios/app/timer-555-calculator-pro/id833443125/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | **100.0% of reviews** | 66.7% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 3 days** |
| Monetization | Paid | Paid |
| Size | 3 MB | 1 MB |
| Requires iOS | **13.2** | 14.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Siu Yuen Ho](https://appshunter.io/developer/814088527) | [Dao Duy Quang](https://appshunter.io/developer/1118825745) |

## What reviewers say

### Timer 555 Calculator Pro

[App page](https://appshunter.io/ios/app/timer-555-calculator-pro/id833443125)

Calculate parameters for monostable and astable circuits. Find component combinations for desired pulse width or frequency. Share circuit files via iCloud Drive or AirDrop.

**Highlights:** Calculate monostable pulse width, Calculate astable frequency, Find component combinations, Adjust component tolerance, Unlimited combinations (Pro), Share circuit files

**In-app purchases:** none


### Loan Calculator Plus

[App page](https://appshunter.io/ios/app/loan-calculator-plus/id1501083494)

Easily calculate loan payments using flat and reducing interest rate methods. Designed for a simple and fast user experience on iPhone and iPad.

**Highlights:** Flat interest rate calculation, Reducing interest rate calculation, Simple input interface, Rapid user experience, iPhone and iPad optimized design

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Timer 555 Calculator Pro free?

Timer 555 Calculator Pro costs $0.99, with no in-app purchases.

### Is Loan Calculator Plus free?

Loan Calculator Plus costs $0.99, with no in-app purchases.

### Do Timer 555 Calculator Pro or Loan Calculator Plus have ads?

Neither Timer 555 Calculator Pro nor Loan Calculator Plus shows ads.

### Which is updated more often, Timer 555 Calculator Pro or Loan Calculator Plus?

Timer 555 Calculator Pro ships an update every 3 months, and Loan Calculator Plus every 3 days. Most recently, Timer 555 Calculator Pro was updated on October 23, 2026 and Loan Calculator Plus on October 4, 2026.

---

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