# ChartDay vs # Simple Graph

The clearest difference is update cadence: # Simple Graph at every 9 days against ChartDay's every 3 weeks. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. ChartDay sells 1 one-off in-app purchase and # Simple Graph sells 2 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

ChartDay ships an update every 3 weeks, # Simple Graph every 9 days. The most recent releases landed on October 6, 2026 and October 4, 2026 respectively.

## The numbers

| Metric | ChartDay | # Simple Graph |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (3 ratings)](https://appshunter.io/ios/app/chartday/id6446491718/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 9 days** |
| Monetization | Freemium | — |
| Size | 2 MB | 50 MB |
| Requires iOS | 16.2 | **15.6** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Fu Ni](https://appshunter.io/developer/1560534229) | [YUKI TANAIKE](https://appshunter.io/developer/478558546) |

## What reviewers say

### ChartDay

[App page](https://appshunter.io/ios/app/chartday/id6446491718)

Track daily habits, health, and fitness with interactive charts. Offers instant statistics, goal setting, and data export. Syncs across devices and provides home screen widgets for quick access.

**Highlights:** Daily tracking with interactive charts, Instant statistical calculations, Goal setting with target lines, Tagging and filtering for organization, Home screen widgets, iCloud sync across devices, Data export to CSV

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| ChartDay Unlimited | $1.99 | one-time |


### # Simple Graph

[App page](https://appshunter.io/ios/app/simple-graph/id6761530584)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Graph Pro (Monthly) | $2.99 | per month |
| Graph Pro (Annual) | $27.00 | per year |


## Frequently asked questions

### Is ChartDay free?

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

### Is # Simple Graph free?

# Simple Graph is free to download, with in-app purchases available.

### Do ChartDay or # Simple Graph have ads?

Neither ChartDay nor # Simple Graph shows ads.

### Which is updated more often, ChartDay or # Simple Graph?

ChartDay ships an update every 3 weeks, and # Simple Graph every 9 days. Most recently, ChartDay was updated on October 6, 2026 and # Simple Graph on October 4, 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.*