# Qualifier Plus IIIx/fx vs LockInCalc

The clearest difference is in-app purchases: LockInCalc at none against Qualifier Plus IIIx/fx's 2. Qualifier Plus IIIx/fx's advantage is chart position (#184 vs unranked) and iOS requirement (15.0 vs 17.2). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Qualifier Plus IIIx/fx sells 2 in-app purchases, starting at $5.99 per month. LockInCalc asks for nothing beyond the download.

Qualifier Plus IIIx/fx ships an update every 10 months, LockInCalc every 7 months. The most recent releases landed on October 23, 2026 and September 26, 2026 respectively.

## The numbers

| Metric | Qualifier Plus IIIx/fx | LockInCalc |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.9 (3.5K ratings)](https://appshunter.io/ios/app/qualifier-plus-iiixfx/id398253583/reviews)** | — |
| Number of ratings | **3.5K** | — |
| Positive reviews | 89.2% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 10 months | **Every 7 months** |
| Monetization | Subscription | — |
| Best chart rank | **#184** | — |
| Size | 28 MB | 1 MB |
| Requires iOS | **15.0** | 17.2 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 12+ | 17+ |
| Developer | [Calculated Industries](https://appshunter.io/developer/370406449) | [Nicholas Pompea](https://appshunter.io/developer/1444570173) |

## What reviewers say

### Qualifier Plus IIIx/fx

[App page](https://appshunter.io/ios/app/qualifier-plus-iiixfx/id398253583)

**Currently charting:** #184 Top Grossing · Finance (US App Store)

This app provides advanced real estate and mortgage finance calculations for professionals. It offers instant solutions for loan payments, buyer qualifying, cash flow analysis, and more, directly on your mobile device.

**Highlights:** Instant loan payment calculations (P&I, PITI), Buyer qualifying for conventional, FHA, and VA loans, Complete cash flow solutions (IRR, NPV, NFV), Amortization schedules with remaining balances, Bi-weekly loans and ARMS calculations, Rent vs. Buy comparisons, Date Math function

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1 Month Full Access | $5.99 | per month |
| 1 Year Full Access | $29.99 | per year |

**What reviewers like**

- 🚀 Convenient and portable
- 👍 Powerful and feature-rich
- 💡 Helpful for real estate professionals
- 👍 Familiar interface for existing users
- 💡 Email integration for sharing calculations

**What reviewers complain about**

- 💰 Subscription model is frustrating
- 🐛 Occasional bugs and glitches
- 💰 Perceived as greedy by developers
- 🔒 Requires in-app purchase to use

**Reported bugs**

- Numbers not saving or changing
- Compatibility issues with newer devices

**Requested features**

- Dark mode option
- Basic free version
- Improved user guide and documentation


### LockInCalc

[App page](https://appshunter.io/ios/app/lockincalc/id6479165530)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Qualifier Plus IIIx/fx free?

Qualifier Plus IIIx/fx is free to download, with in-app purchases available.

### Is LockInCalc free?

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

### Do Qualifier Plus IIIx/fx or LockInCalc have ads?

Neither Qualifier Plus IIIx/fx nor LockInCalc shows ads.

### Which is updated more often, Qualifier Plus IIIx/fx or LockInCalc?

Qualifier Plus IIIx/fx ships an update every 10 months, and LockInCalc every 7 months. Most recently, Qualifier Plus IIIx/fx was updated on October 23, 2026 and LockInCalc on September 26, 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.*