# Geological Field Notes vs SimTunnel Lite

The clearest difference is price: SimTunnel Lite at Free against Geological Field Notes's $4.99. Geological Field Notes's advantage is update cadence (every 3 months vs every 39 months) and iOS requirement (12.0 vs 15.6). On ads, in-app purchases and device support there is nothing between them.

SimTunnel Lite is free to download; Geological Field Notes costs $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Geological Field Notes ships an update every 3 months, SimTunnel Lite every 39 months. The most recent releases landed on August 23, 2026 and September 20, 2026 respectively.

## The numbers

| Metric | Geological Field Notes | SimTunnel Lite |
| --- | --- | --- |
| Price | $4.99 | **Free** |
| Rating | **[1.0 (1 ratings)](https://appshunter.io/ios/app/geological-field-notes/id1013592692/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 39 months |
| Monetization | Paid | — |
| Size | 11 MB | 5 MB |
| Requires iOS | **12.0** | 15.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Liansheng Zhang](https://appshunter.io/developer/448246392) | [Roozbeh Geraili Mikola](https://appshunter.io/developer/1403201499) |

## What reviewers say

### Geological Field Notes

[App page](https://appshunter.io/ios/app/geological-field-notes/id1013592692)

Create detailed geological field notebooks with rich media, including text, images, audio, and drawings. Organize entries with timestamps, passwords, and export them for backup or sharing.

**Highlights:** Rich media note-taking (text, image, audio, video, drawing, links), Integrated geological tools (compass, level, ruler, calculator), Password protection for individual entries, Media expiration options, Export notes as zipped HTML, Cloud backup via Dropbox

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

**In-app purchases:** none


### SimTunnel Lite

[App page](https://appshunter.io/ios/app/simtunnel-lite/id1494413647)

**In-app purchases:** none


## Frequently asked questions

### Is Geological Field Notes free?

Geological Field Notes costs $4.99, with no in-app purchases.

### Is SimTunnel Lite free?

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

### Do Geological Field Notes or SimTunnel Lite have ads?

Neither Geological Field Notes nor SimTunnel Lite shows ads.

### Which is updated more often, Geological Field Notes or SimTunnel Lite?

Geological Field Notes ships an update every 3 months, and SimTunnel Lite every 39 months. Most recently, Geological Field Notes was updated on August 23, 2026 and SimTunnel Lite on September 20, 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.*