# Optimal Blue vs DayProof

The clearest difference is in-app purchases: Optimal Blue at none against DayProof's 1. On price, update cadence, ads and device support there is nothing between them.

Both are free to download. DayProof sells 1 one-off in-app purchase. Optimal Blue asks for nothing beyond the download.

Optimal Blue ships an update monthly, DayProof fortnightly. The most recent releases landed on November 7, 2026 and November 6, 2026 respectively.

## The numbers

| Metric | Optimal Blue | DayProof |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.9 (210 ratings)](https://appshunter.io/ios/app/optimal-blue-ppe/id6469644596/reviews)** | — |
| Number of ratings | **210** | — |
| Positive reviews | 80.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Monthly | **Fortnightly** |
| Monetization | Free | — |
| Size | 37 MB | 24 MB |
| Requires iOS | 18.6 | **18.0** |
| Devices | **iPhone, iPad, Apple Watch** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Optimal Blue LLC](https://appshunter.io/developer/819598914) | [BE A MAN PTY LTD](https://appshunter.io/developer/910439396) |

## What reviewers say

### Optimal Blue

[App page](https://appshunter.io/ios/app/optimal-blue-ppe/id6469644596)

Access a comprehensive mortgage pricing and product engine on your mobile device. Track market indices, receive real-time updates, and generate instant, accurate loan quotes. Ideal for mortgage professionals needing on-the-go access to pricing data and scenario analysis.

**Highlights:** Mortgage product, pricing, and eligibility engine, Track mortgage market indices (OBMMI™), Receive push notifications for updates, Price scenarios and save favorites, Automatic scenario refresh, Access full pricing inputs and custom fields, View eligible and ineligible products with reasons

**Features:** Apple Watch app

**In-app purchases:** none


### DayProof

[App page](https://appshunter.io/ios/app/dayproof-date-calculator/id6801852614)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| DayProof Pro Lifetime | $7.99 | one-time |


## Frequently asked questions

### Is Optimal Blue free?

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

### Is DayProof free?

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

### Do Optimal Blue or DayProof have ads?

Neither Optimal Blue nor DayProof shows ads.

### Which is updated more often, Optimal Blue or DayProof?

Optimal Blue ships an update monthly, and DayProof fortnightly. Most recently, Optimal Blue was updated on November 7, 2026 and DayProof on November 6, 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.*