# Interpolator vs OTMON

The clearest difference is update cadence: OTMON at every 2 months against Interpolator's every 4 months. Interpolator's advantage is iOS requirement (12.0 vs 15.6). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Interpolator ships an update every 4 months, OTMON every 2 months. The most recent releases landed on September 26, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | Interpolator | OTMON |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.9 (74 ratings)](https://appshunter.io/ios/app/interpolator/id635235982/reviews)** | — |
| Number of ratings | **74** | — |
| Positive reviews | 66.7% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 2 months** |
| Monetization | Free | — |
| Size | 18 MB | 39 MB |
| Requires iOS | **12.0** | 15.6 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | +4 | 4+ |
| Developer | [ron mooring](https://appshunter.io/developer/612283157) | [Ardiansyah Setiawan Suci](https://appshunter.io/developer/1827901000) |

## 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


### OTMON

[App page](https://appshunter.io/ios/app/otmon/id6749614899)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Interpolator free?

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

### Is OTMON free?

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

### Do Interpolator or OTMON have ads?

Neither Interpolator nor OTMON shows ads.

### Which is updated more often, Interpolator or OTMON?

Interpolator ships an update every 4 months, and OTMON every 2 months. Most recently, Interpolator was updated on September 26, 2026 and OTMON on October 1, 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.*