# Interpolator vs Wader Pilot Logbook

The clearest difference is in-app purchases: Interpolator at none against Wader Pilot Logbook's 1. Interpolator also leads on rating (4.9 vs 4.6) and ratings volume (74 vs 22). Wader Pilot Logbook's advantage is review sentiment (98% vs 67%) and update cadence (monthly vs every 4 months). On price, ads, monetization model and device support there is nothing between them.

Both are free to download. Wader Pilot Logbook sells 1 in-app purchase, starting at $79.99 per year. Interpolator asks for nothing beyond the download.

Interpolator holds the better App Store score, 4.9 against 4.6. Both are backed by a comparable volume of ratings — 74 and 22 respectively. Written reviews complicate that: 67% of Interpolator's written reviews are positive against 98% of Wader Pilot Logbook's, so the app with the better star average is not the one people write more warmly about.

Interpolator ships an update every 4 months, Wader Pilot Logbook monthly. The most recent releases landed on September 9, 2026 and September 23, 2026 respectively.

## The numbers

| Metric | Interpolator | Wader Pilot Logbook |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.9 (74 ratings)](https://appshunter.io/ios/app/interpolator/id635235982/reviews)** | [4.6 (22 ratings)](https://appshunter.io/ios/app/wader-pilot-logbook/id1582209980/reviews) |
| Number of ratings | **74** | 22 |
| Positive reviews | 66.7% of reviews | **98.1% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 4 months | **Monthly** |
| Monetization | Free | Free |
| Size | 18 MB | 83 MB |
| Requires iOS | **12.0** | 16.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | +4 | 4+ |
| Developer | [ron mooring](https://appshunter.io/developer/612283157) | [Wader Aviation Corp](https://appshunter.io/developer/1582209982) |

## What reviewers say

### Interpolator

[App page](https://appshunter.io/ios/app/interpolator/id635235982)

Easily find values within tables using interpolation for two or three rows. This utility app simplifies calculations without needing a separate calculator, making it ideal for various table-based environments.

**Highlights:** Two-row interpolation, Three-row interpolation, Table value lookup, No calculator needed, Cargo surveyor tool, General table use

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

**In-app purchases:** none


### Wader Pilot Logbook

[App page](https://appshunter.io/ios/app/wader-pilot-logbook/id1582209980)

This app simplifies flight logging for pilots, offering an all-in-one solution to track flight hours and access essential information like weather reports. Cloud syncing ensures your records are always safe and accessible from anywhere, fostering a professional aviation network.

**Highlights:** Flight hour monitoring, Integrated weather reports, Cloud syncing for data backup, Professional aviation network, Accessible from anywhere

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Wader Pro Annual | $79.99 | per year |


## Frequently asked questions

### Is Interpolator free?

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

### Is Wader Pilot Logbook free?

Wader Pilot Logbook is free to download, with in-app purchases available.

### Which has better reviews, Interpolator or Wader Pilot Logbook?

Interpolator is rated higher. Interpolator averages 4.9 out of 5 from 74 ratings, while Wader Pilot Logbook averages 4.6 from 22 ratings.

### Do Interpolator or Wader Pilot Logbook have ads?

Neither Interpolator nor Wader Pilot Logbook shows ads.

### Which is updated more often, Interpolator or Wader Pilot Logbook?

Interpolator ships an update every 4 months, and Wader Pilot Logbook monthly. Most recently, Interpolator was updated on September 9, 2026 and Wader Pilot Logbook on September 23, 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.*