# CalConvert vs AIMChassis

The clearest difference is in-app purchases: AIMChassis at none against CalConvert's 4. AIMChassis also leads on ads (none vs shown) and update cadence (every 3 weeks vs every 3 months). On price and device support there is nothing between them.

Both are free to download. CalConvert sells 4 in-app purchases, starting at $2.99 per month. AIMChassis asks for nothing beyond the download.

CalConvert ships an update every 3 months, AIMChassis every 3 weeks. The most recent releases landed on November 1, 2026 and October 26, 2026 respectively.

## The numbers

| Metric | CalConvert | AIMChassis |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (6.5K ratings)](https://appshunter.io/ios/app/calconvert-currency-converter/id426007025/reviews)** | — |
| Number of ratings | **6.5K** | — |
| Positive reviews | 65.3% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 3 months | **Every 3 weeks** |
| Monetization | Free with in-app purchases | — |
| Size | 315 MB | 87 MB |
| Requires iOS | 15.6 | **11.0** |
| Devices | **iPhone, iPad, iPod, Apple Watch** | iPhone, iPad, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Maple Media Apps, LLC](https://appshunter.io/developer/1289801633) | [American Intermodal Management LLC](https://appshunter.io/developer/1385355031) |

## What reviewers say

### CalConvert

[App page](https://appshunter.io/ios/app/calconvert-currency-converter/id426007025)

This app offers advanced scientific calculations and comprehensive unit and currency conversions. It provides home screen widgets for quick access and supports over 600 units across 27 categories, including 150+ global currencies.

**Highlights:** Advanced scientific calculator, Currency and unit conversion, Home screen widgets, History tape for calculations, Offline currency access, World clock

**Features:** macOS Compatibility, Family Sharing, Apple Watch app, Vision Pro support, iPhone Duo support

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| CalConvert Pro - Monthly | $2.99 | per month |
| CalConvert Pro - Annual | $9.99 | per year |
| CalConvert Pro | Free | one-time |
| CalConvert One Time MP | $39.99 | one-time |

**What reviewers like**

- 🚀 Excellent calculator and converter
- 👍 Easy to use and intuitive interface
- 🔢 Large, clear numbers for good visibility
- 💡 Comprehensive conversion options

**What reviewers complain about**

- 🤖 Excessive, intrusive ads
- 🔒 Locking features behind subscription paywall
- 🐛 Bugs and glitches after recent updates
- 🤯 Frustrating user experience due to ads

**Reported bugs**

- Subtraction function not working properly
- Conversion values not updating correctly
- Themes and settings not functioning as expected

**Requested features**

- Ability to rearrange currency order
- Option to remove ads with one-time purchase
- Improved performance and stability


### AIMChassis

[App page](https://appshunter.io/ios/app/aimchassis/id1460045878)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is CalConvert free?

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

### Is AIMChassis free?

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

### Do CalConvert or AIMChassis have ads?

CalConvert shows ads; AIMChassis does not.

### Which is updated more often, CalConvert or AIMChassis?

CalConvert ships an update every 3 months, and AIMChassis every 3 weeks. Most recently, CalConvert was updated on November 1, 2026 and AIMChassis on October 26, 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.*