# DamApp vs Manhole Notebook

The clearest difference is in-app purchases: DamApp at none against Manhole Notebook's 1. Manhole Notebook's advantage is update cadence (weekly vs every 2 months). On price, ads, device support and iOS requirement there is nothing between them.

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

DamApp ships an update every 2 months, Manhole Notebook weekly. The most recent releases landed on October 10, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | DamApp | Manhole Notebook |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 85.7% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Weekly** |
| Monetization | Free | — |
| Size | 228 MB | 15 MB |
| Requires iOS | 17.0 | 17.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 17+ | 4+ |
| Developer | [Yuta Kokubo](https://appshunter.io/developer/1549449778) | [Gabriel Barandiaran Silveira](https://appshunter.io/developer/1867230690) |

## What reviewers say

### DamApp

[App page](https://appshunter.io/ios/app/damapp/id1549449776)

Discover over 2,000 dams across Japan. Search by name, distance, prefecture, type, or purpose. Record check-ins, dam card ownership, and add favorites or notes. All dam information is available offline.

**Highlights:** Search over 2,000 dams nationwide, Filter by distance, prefecture, type, purpose, Offline access to dam details, Record check-ins and dam card ownership, Map view with MAPCODE support, Import visit records from text files

**Features:** Vision Pro support

**In-app purchases:** none


### Manhole Notebook

[App page](https://appshunter.io/ios/app/manhole-notebook/id6759797202)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Yearly | $14.99 | per year |


## Frequently asked questions

### Is DamApp free?

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

### Is Manhole Notebook free?

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

### Do DamApp or Manhole Notebook have ads?

Neither DamApp nor Manhole Notebook shows ads.

### Which is updated more often, DamApp or Manhole Notebook?

DamApp ships an update every 2 months, and Manhole Notebook weekly. Most recently, DamApp was updated on October 10, 2026 and Manhole Notebook on October 8, 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.*