# JSA vs Timelapse Ref Calc

The clearest difference is price: JSA at Free against Timelapse Ref Calc's $0.49. JSA also leads on update cadence (every 6 weeks vs every 4 months). Timelapse Ref Calc's advantage is in-app purchases (none vs 5). On ads, device support and iOS requirement there is nothing between them.

JSA is free to download; Timelapse Ref Calc costs $0.49 up front. JSA sells 5 one-off in-app purchases. Timelapse Ref Calc asks for nothing beyond the download.

JSA ships an update every 6 weeks, Timelapse Ref Calc every 4 months. The most recent releases landed on September 11, 2026 and September 17, 2026 respectively.

## The numbers

| Metric | JSA | Timelapse Ref Calc |
| --- | --- | --- |
| Price | **Free** | $0.49 |
| Rating | **[4.7 (3 ratings)](https://appshunter.io/ios/app/jsa-onthego/id1369505754/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | 33.3% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 6 weeks** | Every 4 months |
| Monetization | Free with in-app purchases | — |
| Size | 17 MB | 0 MB |
| Requires iOS | **12.0** | 13.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Job Safety OnTheGo Pty Ltd](https://appshunter.io/developer/1367096564) | [Stein Erik Nilsen](https://appshunter.io/developer/1737251651) |

## What reviewers say

### JSA

[App page](https://appshunter.io/ios/app/jsa-onthego/id1369505754)

Streamline job safety analyses with AI-powered risk assessment and PPE generation. Create professional, color-coded PDF documents with digital signatures and timestamps. Features include customizable risk matrices, voice recognition, and the ability to reuse previous analyses.

**Highlights:** AI-powered JSA/JHA/JSEA generation, Automated risk assessment and PPE recommendations, Customizable risk matrix editor, Voice recognition for faster input, Reuse of previous JSA/JHA documents, Cloud saving and offline access, Digitally signed and timestamped PDF reports

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

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| JSA On-Demand | $0.99 | one-time |
| One month subscription | $9.99 | one-time |
| Three month subscription | $25.99 | one-time |
| Six month subscription | $47.99 | one-time |
| Full year subscription | $89.99 | one-time |


### Timelapse Ref Calc

[App page](https://appshunter.io/ios/app/timelapse-ref-calc/id6482289854)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is JSA free?

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

### Is Timelapse Ref Calc free?

Timelapse Ref Calc costs $0.49, with no in-app purchases.

### Do JSA or Timelapse Ref Calc have ads?

Neither JSA nor Timelapse Ref Calc shows ads.

### Which is updated more often, JSA or Timelapse Ref Calc?

JSA ships an update every 6 weeks, and Timelapse Ref Calc every 4 months. Most recently, JSA was updated on September 11, 2026 and Timelapse Ref Calc on September 17, 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.*