Comparison

EmboRatio vs Periodontal Chart

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head

EmboRatio

Volume embolization ratio Calc

Periodontal disease

About

EmboRatio

Calculate the necessary coil length for aneurysm embolization. This tool also computes the current embolic rate and lists available coils in Japan.

Highlights

Coil length calculation for aneurysms
Embolic rate calculation
List of available coils in Japan
Medical calculation tool

Features

Read full description

Displays the required length of the coil for the volume of the aneurysm. The current embolic rate can also be calculated. The Coils available only in Japan is listed.

About

Periodontal Chart

This app allows dentists to create, save, and print detailed periodontal examination charts. It supports input for PPD, Mobility, and PCR measurements, streamlining patient data management for dental professionals.

Highlights

Create periodontal charts
Input PPD, Mobility, PCR
Save patient data
Print examination records
Designed for dentists

Features

Read full description

Create a perio chart (periodontal examination) specifically for dentists. You can input "PPD," "Mobility," and "PCR" according to the patient and examination details, and save and print the relevant data. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

EmboRatio2 screens

Periodontal Chart4 screens

Verdict

The call

The clearest difference is in-app purchases: EmboRatio at none against Periodontal Chart's 2. EmboRatio also leads on ads (none vs shown) and review sentiment (100% vs 71%). Periodontal Chart's advantage is update cadence (weekly vs every 4 months). On price, device support and iOS requirement there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Periodontal Chart sells 2 in-app purchases, starting at $1.99 per month. EmboRatio asks for nothing beyond the download.

UpkeepUpdate frequency

EmboRatio ships an update every 4 months, Periodontal Chart weekly. The most recent releases landed on October 26, 2026 and October 27, 2026 respectively.

Scorecard5 real differences · 3 level

EmboRatio versus Periodontal Chart: the parameters behind the verdict, then further details
Parameter	EmboRatio	Periodontal Chart
Price	Free	Free
Positive reviews	100.0% of reviews — better	71.4% of reviews
Update frequency	Every 4 months	Weekly — better
Ads	No — better	Yes
In-app purchases	No — better	Yes
Monetization	Free — better	Free with in-app purchases
Devices	iPhone, iPad, iPod	iPhone, iPad, iPod, Mac — better
Requires iOS	15.4	15.1 — better
Further details — not scored
Size	1 MB	39 MB
Age rating	4+	12+
Developer	Masaaki Hirata	Yuki Kuwahara

Customer experience

EmboRatio

Written reviews1 reviews

Positive100.0%

Neutral0.0%

Negative0.0%

Periodontal Chart

Written reviews7 reviews

Positive71.4%

Neutral14.3%

Negative14.3%

In-app purchases

None

EmboRatio

No in-app purchases

2 purchases

Periodontal Chart

Subscriptions2

ペリオチャートサブスクリプション$1.991 Month
ペリオチャートサブスクリプション$5.991 Month

Questions

Is EmboRatio free?

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

Is Periodontal Chart free?

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

Do EmboRatio or Periodontal Chart have ads?

Periodontal Chart shows ads; EmboRatio does not.

Which is updated more often, EmboRatio or Periodontal Chart?

EmboRatio ships an update every 4 months, and Periodontal Chart weekly. Most recently, EmboRatio was updated on October 26, 2026 and Periodontal Chart on October 27, 2026.