# Predilux vs CheckMarked

The clearest difference is rating: CheckMarked at 5.0 against Predilux's 3.5. CheckMarked also leads on in-app purchases (none vs 1) and update cadence (every 3 weeks vs every 4 months). Predilux's advantage is iOS requirement (12.0 vs 26.0). On price, ratings volume, ads and device support there is nothing between them.

Both are free to download. Predilux sells 1 in-app purchase, starting at $14.99 per year. CheckMarked asks for nothing beyond the download.

CheckMarked holds the better App Store score, 5.0 against 3.5. Both are backed by a comparable volume of ratings — 2 and 3 respectively.

Predilux ships an update every 4 months, CheckMarked every 3 weeks. The most recent releases landed on September 9, 2026 and June 1, 2026 respectively.

## The numbers

| Metric | Predilux | CheckMarked |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.5 (2 ratings)](https://appshunter.io/ios/app/predilux/id1168322032/reviews) | **[5.0 (3 ratings)](https://appshunter.io/ios/app/checkmarked/id6444661935/reviews)** |
| Number of ratings | 2 | **3** |
| Positive reviews | 20.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 3 weeks** |
| Monetization | Subscription | **Free** |
| Size | 69 MB | 8 MB |
| Requires iOS | **12.0** | 26.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [WID LLC](https://appshunter.io/developer/522765968) | [David Powers](https://appshunter.io/developer/1561429579) |

## What reviewers say

### Predilux

[App page](https://appshunter.io/ios/app/predilux/id1168322032)

This app helps photographers and videographers predict light exposure based on light source and distance. It also allows inverse measurement of distance by specifying exposure, considering various camera and light source settings, and gels.

**Highlights:** Predict light exposure, Measure distance to light source, Adjust camera settings (FPS, ISO, Shutter), Configure light source settings, Apply gel effects (Diffusion, CTO/CTB, +- Green), Experimentally verified results

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Predilux | $14.99 | per year |


### CheckMarked

[App page](https://appshunter.io/ios/app/checkmarked/id6444661935)

Organize your thoughts and tasks using Markdown in a sleek, modern interface. Seamlessly integrate your notes with Obsidian for enhanced productivity.

**Highlights:** Markdown list support, Clean, modern iOS interface, Obsidian integration, Task organization, Note-taking

**In-app purchases:** none


## Frequently asked questions

### Is Predilux free?

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

### Is CheckMarked free?

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

### Which has better reviews, Predilux or CheckMarked?

CheckMarked is rated higher. Predilux averages 3.5 out of 5 from 2 ratings, while CheckMarked averages 5.0 from 3 ratings.

### Do Predilux or CheckMarked have ads?

Neither Predilux nor CheckMarked shows ads.

### Which is updated more often, Predilux or CheckMarked?

Predilux ships an update every 4 months, and CheckMarked every 3 weeks. Most recently, Predilux was updated on September 9, 2026 and CheckMarked on June 1, 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.*