# Tabi Calc vs Overnight Screen Light

The clearest difference is in-app purchases: Overnight Screen Light at none against Tabi Calc's 3. Overnight Screen Light also leads on ads (none vs shown). On price, device support and iOS requirement there is nothing between them.

Both are free to download. Tabi Calc sells 3 in-app purchases, starting at $0.99 per month. Overnight Screen Light asks for nothing beyond the download.

## The numbers

| Metric | Tabi Calc | Overnight Screen Light |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.9 (40 ratings)](https://appshunter.io/ios/app/tabi-calc/id1246912834/reviews)** | — |
| Number of ratings | **40** | — |
| Positive reviews | 43.9% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 3 weeks | — |
| Monetization | Free with in-app purchases | — |
| Size | 13 MB | 46 MB |
| Requires iOS | 17.0 | **16.4** |
| Devices | **iPhone, iPad, Apple Watch** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Tsuyoshi Niwa](https://appshunter.io/developer/888556976) | [Sandro Padin](https://appshunter.io/developer/1632692397) |

## What reviewers say

### Tabi Calc

[App page](https://appshunter.io/ios/app/tabi-calc/id1246912834)

This app is a travel-focused calculator that simplifies date, time, and currency calculations. It helps users plan trips, manage itineraries, and convert currencies with live or offline rates. Designed for travelers, it offers an intuitive interface and accurate results.

**Highlights:** Date and time difference calculations, Add/subtract days, months, years from dates, Multi-currency converter with live/offline rates, Supports over 160 currencies, Location-based currency suggestions, Offline currency rate support, Saves recent calculations

**Features:** Family Sharing, Apple Watch app, Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Subscription | $0.99 | per month |
| 6 month subscription | $4.49 | per 6 months |
| Yearly Subscription | $7.99 | per year |


### Overnight Screen Light

[App page](https://appshunter.io/ios/app/overnight-screen-light/id6762953105)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Tabi Calc free?

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

### Is Overnight Screen Light free?

Overnight Screen Light is free to download, with no in-app purchases.

### Do Tabi Calc or Overnight Screen Light have ads?

Tabi Calc shows ads; Overnight Screen Light does not.

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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.*