# ConcreteDNA vs Highlight PDF

The clearest difference is in-app purchases: ConcreteDNA at none against Highlight PDF's 3. ConcreteDNA also leads on update cadence (fortnightly vs every 4 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Highlight PDF sells 3 in-app purchases, starting at $7.99 per month. ConcreteDNA asks for nothing beyond the download.

ConcreteDNA ships an update fortnightly, Highlight PDF every 4 months. The most recent releases landed on October 6, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | ConcreteDNA | Highlight PDF |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.0 (4 ratings)](https://appshunter.io/ios/app/concretedna/id1457340144/reviews)** | — |
| Number of ratings | **4** | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 4 months |
| Monetization | Ad-supported | — |
| Size | 34 MB | 24 MB |
| Requires iOS | **16.6** | 17.6 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Converge](https://appshunter.io/developer/1457340143) | [Fenuku Kekeli](https://appshunter.io/developer/1822419894) |

## What reviewers say

### ConcreteDNA

[App page](https://appshunter.io/ios/app/concretedna/id1457340144)

Monitor concrete strength and temperature in real-time with sensor data sent directly to the cloud. Access live site data from anywhere, receive instant alerts, and generate QA reports for simplified paperwork. Supports collection from Converge Signal sensors.

**Highlights:** Live concrete strength feedback, Instant action alerts, Cloud access for teams, Temperature monitoring, QA report generation, Converge Signal sensor support

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

**In-app purchases:** none


### Highlight PDF

[App page](https://appshunter.io/ios/app/highlight-pdf-markup-notes/id6756120385)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| All Access for a month | $7.99 | per month |
| All Access for a year | $39.99 | per year |
| All Access to Lifetime | $99.99 | one-time |


## Frequently asked questions

### Is ConcreteDNA free?

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

### Is Highlight PDF free?

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

### Do ConcreteDNA or Highlight PDF have ads?

Neither ConcreteDNA nor Highlight PDF shows ads.

### Which is updated more often, ConcreteDNA or Highlight PDF?

ConcreteDNA ships an update fortnightly, and Highlight PDF every 4 months. Most recently, ConcreteDNA was updated on October 6, 2026 and Highlight PDF on October 28, 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.*