# Contrigraph vs Stamp Bookkeeping

The clearest difference is in-app purchases: Stamp Bookkeeping at none against Contrigraph's 1. Stamp Bookkeeping also leads on iOS requirement (15.0 vs 17.5). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Contrigraph sells 1 one-off in-app purchase. Stamp Bookkeeping asks for nothing beyond the download.

Contrigraph ships an update every 6 days, Stamp Bookkeeping every 5 days. The most recent releases landed on October 6, 2026 and October 18, 2026 respectively.

## The numbers

| Metric | Contrigraph | Stamp Bookkeeping |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 6 days | **Every 5 days** |
| Size | 10 MB | 28 MB |
| Requires iOS | 17.5 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Hajime Nakamura](https://appshunter.io/developer/1011217140) | [CELLBORN LIMITED LIABILITY COMPANY](https://appshunter.io/developer/1791037056) |

## What reviewers say

### Contrigraph

[App page](https://appshunter.io/ios/app/contrigraph-habit-tracker/id6612007595)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $1.99 | one-time |


### Stamp Bookkeeping

[App page](https://appshunter.io/ios/app/stamp-bookkeeping/id6740690214)

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

**In-app purchases:** none


## Frequently asked questions

### Is Contrigraph free?

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

### Is Stamp Bookkeeping free?

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

### Do Contrigraph or Stamp Bookkeeping have ads?

Neither Contrigraph nor Stamp Bookkeeping shows ads.

### Which is updated more often, Contrigraph or Stamp Bookkeeping?

Contrigraph ships an update every 6 days, and Stamp Bookkeeping every 5 days. Most recently, Contrigraph was updated on October 6, 2026 and Stamp Bookkeeping on October 18, 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.*