# Interpolator vs Julian Clock

The clearest difference is price: Interpolator at Free against Julian Clock's $0.99. Interpolator also leads on update cadence (every 4 months vs every 69 months) and ratings volume (74 vs 15). Julian Clock's advantage is review sentiment (100% vs 67%) and chart position (#71 vs unranked). On rating, ads, in-app purchases and device support there is nothing between them.

Interpolator is free to download; Julian Clock costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

On the App Store both sit at effectively the same score — 4.9 for Interpolator against 4.9 for Julian Clock. Both are backed by a comparable volume of ratings — 74 and 15 respectively. Written reviews are what separate them: 67% of Interpolator's written reviews are positive against 100% of Julian Clock's.

Interpolator ships an update every 4 months, Julian Clock every 69 months. The most recent releases landed on September 26, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | Interpolator | Julian Clock |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| Rating | [4.9 (74 ratings)](https://appshunter.io/ios/app/interpolator/id635235982/reviews) | [4.9 (15 ratings)](https://appshunter.io/ios/app/julian-clock/id959214765/reviews) |
| Number of ratings | **74** | 15 |
| Positive reviews | 66.7% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 4 months** | Every 69 months |
| Monetization | **Free** | Paid |
| Best chart rank | — | **#71** |
| Size | 18 MB | 4 MB |
| Requires iOS | **12.0** | 17.0 |
| Devices | iPhone, iPod | **iPhone, iPad, Apple Watch** |
| Age rating | +4 | 4+ |
| Developer | [ron mooring](https://appshunter.io/developer/612283157) | [Adam Allard](https://appshunter.io/developer/959214764) |

## 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


### Julian Clock

[App page](https://appshunter.io/ios/app/julian-clock/id959214765)

**Currently charting:** #71 Top Paid · Utilities (US App Store)

This utility app displays the current Julian Date, time with seconds, military date format, day of the week, and Zulu time (GMT). It's designed for quick access to essential timekeeping information.

**Highlights:** Julian Date display, Real-time clock with seconds, Military date format, Day of the week, ZULU time (GMT)

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Interpolator free?

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

### Is Julian Clock free?

Julian Clock costs $0.99, with no in-app purchases.

### Which has better reviews, Interpolator or Julian Clock?

Interpolator and Julian Clock are both rated 4.9 out of 5 on the App Store, from 74 and 15 ratings respectively.

### Do Interpolator or Julian Clock have ads?

Neither Interpolator nor Julian Clock shows ads.

### Which is updated more often, Interpolator or Julian Clock?

Interpolator ships an update every 4 months, and Julian Clock every 69 months. Most recently, Interpolator was updated on September 26, 2026 and Julian Clock 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.*