Timer 555 Calculator vs Bode Plot
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Timer 555 Calculator
Calculate monostable and astable circuits for electronics projects. Determine pulse width and frequency, find component combinations, and save/upload data. Supports multiple languages.
- Monostable circuit pulse width calculation
- Astable circuit frequency calculation
- Component combination finder
- Save component values to CSV
- Upload CSV via AirDrop/iCloud Drive
- Multi-language support
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This app is used to calculate monostable and astable circuit. Features * Calculate pulse width of monostable circuit * Calculate frequency of astable circuit * Find out combination of components making a desire pulse width in monostable circuit * Find out combination of components making a desire frequency in astable circuit * Saving component values in CSV file * Upload generated CSV files via AirDrop or iCloud Drive * Support English, German, French, Italian, Spanish, Portuguese, Japanese, Korean, Russian
Bode Plot
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Bode Plotは、伝達関数 G(s) を入力するだけでボード線図（ゲイン線図と位相線図）を自動生成するアプリです。 ・伝達関数をそのまま入力（例：G(s)=100/(s*(s+1)^2)） ・ゲイン線図：20log|G(jw)|を表示 ・位相線図：∠G(jw)を表示 ・周波数範囲（10^x）や点数をスライダーで調整 ・入力式は端末内に保存、いつでも続きから
Screenshots
Verdict
The clearest difference is in-app purchases: Bode Plot at none against Timer 555 Calculator's 1. Timer 555 Calculator's advantage is iOS requirement (13.2 vs 26.2). On price, update cadence, ads 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
Both are free to download. Timer 555 Calculator sells 1 one-off in-app purchase. Bode Plot asks for nothing beyond the download.
Timer 555 Calculator ships an update every 3 months, Bode Plot every 5 months. The most recent releases landed on September 24, 2026 and September 9, 2026 respectively.
| Parameter | Timer 555 Calculator | Bode Plot |
|---|---|---|
| Price | Free | Free |
| Rating | 3.9 (8 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 8 — better | — |
| Update frequency | Every 3 months — better | Every 5 months |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 13.2 — better | 26.2 |
| Further details — not scored | ||
| Size | 3 MB | 1 MB |
| Age rating | 4+ | 4+ |
| Developer | Siu Yuen Ho | Yuta Nishimatsu |
In-app purchases
Timer 555 Calculator
- Unlock Pro feature$0.99
Bode Plot
No in-app purchases
Questions
Is Timer 555 Calculator free?
Is Bode Plot free?
Do Timer 555 Calculator or Bode Plot have ads?
Which is updated more often, Timer 555 Calculator or Bode Plot?
Other comparisons
