Grandpa Notes vs UnitNote
Price, ratings, monetisation and update history for both apps, side by side β with what reviewers say about each.
Grandpa Notes
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Grandpa Notes is a simple note-taking app. It is free and open source, with no advertisements, in-app purchases or tracking. Your notes are stored as plain text in a straightforward folder structure. You can create notebooks locally or in iCloud. There is also an optional encryption layer that is compatible with Cryptomator.
UnitNote
This tool simplifies unit conversions for everyday and professional needs. Customize your home screen with unit cards, perform quick calculations with a numeric keypad and formula input, and compare values across different units in a workspace. It supports a wide range of units and offers multiple themes and languages.
- Customizable home screen with unit cards
- Numeric keypad and formula input
- Intuitive unit selection and card arrangement
- Workspace for comparing multiple unit conversions
- Support for diverse units (length, area, volume, etc.)
- Favorites and recent history
- Multiple themes and languages
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UnitNote is a unit conversion tool that helps you manage everyday and professional units in one place. β’ Arrange unit cards freely on the home screen and hide the cards you don't need. β’ Use the numeric keypad and formula input to convert units and perform calculations quickly. β’ Build your ideal conversion environment intuitively by selecting units and moving cards. β’ Place multiple unit cards together in the workspace to compare values. β’ Supports a wide range of units, including length, area, volume, mass, temperature, time, speed, angle, pressure, torque, and flow rate. β’ Easily revisit frequently used conversions with Favorites and Recent History. β’ Supports System, Light, and Dark themes, and is available in Korean, English, Japanese, and Spanish. Convert complex units faster and more naturally with UnitNote.
Screenshots
Verdict
The clearest difference is update cadence: UnitNote at every 8 days against Grandpa Notes's every 20 months. On price, ads, in-app purchases and device support there is nothing between them.
Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Grandpa Notes ships an update every 20 months, UnitNote every 8 days. The most recent releases landed on September 10, 2026 and September 17, 2026 respectively.
| Parameter | Grandpa Notes | UnitNote |
|---|---|---|
| Price | Free | Free |
| Positive reviews | β | 100.0% of reviews |
| Update frequency | Every 20 months | Every 8 days β better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | β | Free with in-app purchases |
| Devices | iPhone, iPad β better | iPhone |
| Requires iOS | 17.0 | 17.0 |
| Further details β not scored | ||
| Size | 3 MB | 51 MB |
| Age rating | 4+ | 4+ |
| Developer | Julien Eyriès | SOON HUH |
In-app purchases
Grandpa Notes
No in-app purchases
UnitNote
No in-app purchases





