# iScaleModel vs Modellers Reference Library

The clearest difference is rating: Modellers Reference Library at 5.0 against iScaleModel's 2.0. Modellers Reference Library also leads on ads (none vs shown) and review sentiment (67% vs 50%). iScaleModel's advantage is in-app purchases (none vs 20). On price, ratings volume, update cadence and device support there is nothing between them.

Both are free to download. Modellers Reference Library sells 20 one-off in-app purchases. iScaleModel asks for nothing beyond the download.

Modellers Reference Library holds the better App Store score, 5.0 against 2.0. Both are backed by a comparable volume of ratings — 2 and 4 respectively. Written reviews point the same way: 50% of iScaleModel's written reviews are positive against 67% of Modellers Reference Library's.

iScaleModel ships an update every 6 months, Modellers Reference Library every 8 months. The most recent releases landed on September 24, 2026 and September 30, 2026 respectively.

## The numbers

| Metric | iScaleModel | Modellers Reference Library |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.0 (2 ratings)](https://appshunter.io/ios/app/iscalemodel/id432104593/reviews) | **[5.0 (4 ratings)](https://appshunter.io/ios/app/modellers-reference-library/id531146250/reviews)** |
| Number of ratings | 2 | **4** |
| Positive reviews | 50.0% of reviews | **66.7% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | **Every 6 months** | Every 8 months |
| Monetization | **Ad-supported** | Free with in-app purchases |
| Size | 36 MB | 30 MB |
| Requires iOS | 12.0 | **10.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Andrew Jackson](https://appshunter.io/developer/411934924) | [Doolittle Media Ltd](https://appshunter.io/developer/1545366363) |

## What reviewers say

### iScaleModel

[App page](https://appshunter.io/ios/app/iscalemodel/id432104593)

Easily convert measurements between metric and imperial units for scale models. Adjust ratios with a slider to see scaled-up or scaled-down comparisons.

**Highlights:** Metric and Imperial unit conversion, Scale up or down functionality, Adjustable ratio slider, Real-time value adjustment, Simple, intuitive interface

**In-app purchases:** none


### Modellers Reference Library

[App page](https://appshunter.io/ios/app/modellers-reference-library/id531146250)

Access a vast digital library of model building guides and how-to catalogues for plastic models, military vehicles, aircraft, and radio-controlled cars. Discover books, including out-of-print titles, with new content added weekly. Purchases are protected and accessible across multiple devices via a pocketmags account.

**Highlights:** Digital model building guides, How-to catalogues, Covers plastic, military, aircraft, RC vehicles, Access out-of-print books, Weekly content updates, Cross-platform purchases via pocketmags

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

**In-app purchases (20)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Cold War Aircra... (id:807515) | $7.99 | one-time |
| Cold War Aircra... (id:807516) | $7.99 | one-time |
| Tamiya Spitfire... (id:807708) | $8.99 | one-time |
| How to Build th... (id:807832) | $8.99 | one-time |
| Tamiya 1:32 P-5... (id:809503) | $9.99 | one-time |
| Revell's 1:32 M... (id:809513) | $9.99 | one-time |
| B-17 Flying For... (id:809437) | $9.99 | one-time |
| How to Build th... (id:809545) | $10.99 | one-time |
| How to build Ta... (id:809558) | $10.99 | one-time |
| How To Build Ta... (id:809544) | $10.99 | one-time |
| Tamiya 1:32 Mos... (id:809547) | $10.99 | one-time |
| Tamiya Spitfire... (id:809548) | $10.99 | one-time |
| Revised Tamiya ... (id:809606) | $10.99 | one-time |
| PANAVIA TORNADO... (id:810017) | $12.99 | one-time |
| F-104 STARFIGHT... (id:810019) | $12.99 | one-time |
| The Modeller’s ... (id:810085) | $13.99 | one-time |
| Modelling an Ic... (id:810119) | $14.99 | one-time |
| Monogram's Cen... (pp:1001612) | $14.99 | one-time |
| How to Build th... (id:810129) | $14.99 | one-time |
| MCDONNELL F-4 ... (pp:1088169) | $14.99 | one-time |


## Frequently asked questions

### Is iScaleModel free?

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

### Is Modellers Reference Library free?

Modellers Reference Library is free to download, with in-app purchases available.

### Which has better reviews, iScaleModel or Modellers Reference Library?

Modellers Reference Library is rated higher. iScaleModel averages 2.0 out of 5 from 2 ratings, while Modellers Reference Library averages 5.0 from 4 ratings.

### Do iScaleModel or Modellers Reference Library have ads?

iScaleModel shows ads; Modellers Reference Library does not.

### Which is updated more often, iScaleModel or Modellers Reference Library?

iScaleModel ships an update every 6 months, and Modellers Reference Library every 8 months. Most recently, iScaleModel was updated on September 24, 2026 and Modellers Reference Library on September 30, 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.*