# Chart Builder Graph Maker vs DIY Units Conversion

The clearest difference is rating: DIY Units Conversion at 5.0 against Chart Builder Graph Maker's 4.4. DIY Units Conversion also leads on review sentiment (100% vs 62%) and ads (none vs shown). Chart Builder Graph Maker's advantage is update cadence (every 2 days vs every 25 months) and ratings volume (127 vs 1). On price, in-app purchases, device support and iOS requirement there is nothing between them.

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

DIY Units Conversion holds the better App Store score, 5.0 against 4.4. That said, the two scores are not equally well evidenced: Chart Builder Graph Maker has 127 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 62% of Chart Builder Graph Maker's written reviews are positive against 100% of DIY Units Conversion's.

Chart Builder Graph Maker ships an update every 2 days, DIY Units Conversion every 25 months. The most recent releases landed on October 8, 2026 and September 8, 2026 respectively.

## The numbers

| Metric | Chart Builder Graph Maker | DIY Units Conversion |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.4 (127 ratings)](https://appshunter.io/ios/app/chart-builder-graph-maker/id6448167767/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/diy-units-conversion/id6475029001/reviews)** |
| Number of ratings | **127** | 1 |
| Positive reviews | 61.5% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | **Every 2 days** | Every 25 months |
| Monetization | Free with in-app purchases | **Free** |
| Size | 34 MB | 31 MB |
| Requires iOS | 12.0 | 12.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Keitaro Ohno](https://appshunter.io/developer/1202540366) | [DingXin Cheng](https://appshunter.io/developer/1645815345) |

## What reviewers say

### Chart Builder Graph Maker

[App page](https://appshunter.io/ios/app/chart-builder-graph-maker/id6448167767)

Easily create professional line, bar, and pie charts. Visualize your data with intuitive tools and share your creations.

**Highlights:** Create line charts, Create bar charts, Create pie charts, Intuitive design tools, Data visualization

**In-app purchases:** none


### DIY Units Conversion

[App page](https://appshunter.io/ios/app/diy-units-conversion/id6475029001)

Create your own personalized unit conversion library by adding, removing, and reordering conversions. Tailor the app to your specific needs, focusing on the units you use most frequently.

**Highlights:** Customizable conversion library, Add, remove, and reorder units, Supports various scientific fields, User-defined conversion sets

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Chart Builder Graph Maker free?

Chart Builder Graph Maker is free to download, with no in-app purchases.

### Is DIY Units Conversion free?

DIY Units Conversion is free to download, with no in-app purchases.

### Which has better reviews, Chart Builder Graph Maker or DIY Units Conversion?

DIY Units Conversion is rated higher. Chart Builder Graph Maker averages 4.4 out of 5 from 127 ratings, while DIY Units Conversion averages 5.0 from 1 ratings.

### Do Chart Builder Graph Maker or DIY Units Conversion have ads?

Chart Builder Graph Maker shows ads; DIY Units Conversion does not.

### Which is updated more often, Chart Builder Graph Maker or DIY Units Conversion?

Chart Builder Graph Maker ships an update every 2 days, and DIY Units Conversion every 25 months. Most recently, Chart Builder Graph Maker was updated on October 8, 2026 and DIY Units Conversion on September 8, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*