Comparison

SimpleFFT vs Orthodox Bells

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

Head to head

Frequency analysis

St. Spyridon NYC Bells

Free

🔧 Utilities

★ 5.02 ratingsView app →

About

SimpleFFT

Features

Read full description

This app can easily analyze the frequency of sound. For the sound of the recording file recorded at each refresh time interval, FFT is executed and displayed for the four voices collected one after another at each refresh interval.

About

Orthodox Bells

Features

Read full description

Application for connecting your iPad or iPhone to the speakers for ringing Orthodox Bells

Screenshots

SimpleFFT4 screens

Orthodox Bells2 screens

Verdict

The call

The clearest difference is in-app purchases: Orthodox Bells at none against SimpleFFT's 1. Orthodox Bells also leads on ads (none vs shown) and update cadence (every 5 days vs every 18 months). SimpleFFT's advantage is iOS requirement (15.0 vs 26.1). On price and device support 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. SimpleFFT sells 1 one-off in-app purchase. Orthodox Bells asks for nothing beyond the download.

UpkeepUpdate frequency

SimpleFFT ships an update every 18 months, Orthodox Bells every 5 days. The most recent releases landed on October 10, 2026 and October 24, 2026 respectively.

Scorecard4 real differences · 4 level

SimpleFFT versus Orthodox Bells: the parameters behind the verdict, then further details
Parameter	SimpleFFT	Orthodox Bells
Price	Free	Free
Rating	—	5.0 (2 ratings) — better
Number of ratings	—	2 — better
Update frequency	Every 18 months	Every 5 days — better
Ads	Yes	No — better
In-app purchases	Yes	No — better
Devices	iPhone, iPad, iPod — better	iPhone, iPad
Requires iOS	15.0 — better	26.1
Further details — not scored
Size	5 MB	55 MB
Age rating	4+	4+
Developer	HIROFUMI MARUO	TELEMACHOS STAMKOPOULOS

In-app purchases

1 purchases

SimpleFFT

One-time1

Premium Functions$0.49

None

Orthodox Bells

No in-app purchases

Questions

Is SimpleFFT free?

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

Is Orthodox Bells free?

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

Do SimpleFFT or Orthodox Bells have ads?

SimpleFFT shows ads; Orthodox Bells does not.

Which is updated more often, SimpleFFT or Orthodox Bells?

SimpleFFT ships an update every 18 months, and Orthodox Bells every 5 days. Most recently, SimpleFFT was updated on October 10, 2026 and Orthodox Bells on October 24, 2026.