555 Calc vs Bode Plot
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
555 Calc
This utility app helps engineers and hobbyists calculate resistor values for circuits using the Timer IC 555. Simply input frequency, duty ratio, and capacitor values to get the required resistor outputs.
- Calculate resistor values
- Input frequency
- Input duty ratio
- Input capacitor value
- Timer IC 555 circuit design
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This App calculates registors value, when designing the circuit using Timer IC 555. How to (1) Input Frequency value. (2) Input Duty Ratio. (3) Input C1 Value. (4) Touch ‘Calculate’ button. (5) Registors value will be displayed. Note. * Set Duty Ratio to 50 ~ 99. * If you set Duty Ratio to 50, R1 value will be set to 0.
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 ads: Bode Plot at none against 555 Calc's shown. Bode Plot also leads on update cadence (every 5 months vs every 20 months). 555 Calc's advantage is iOS requirement (11.0 vs 26.2). On price, in-app purchases 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. Neither carries in-app purchases, so what you see is what you pay.
555 Calc ships an update every 20 months, Bode Plot every 5 months. The most recent releases landed on October 13, 2026 and October 11, 2026 respectively.
| Parameter | 555 Calc | Bode Plot |
|---|---|---|
| Price | Free | Free |
| Rating | 4.0 (3 ratings) — better | — |
| Positive reviews | 50.0% of reviews | — |
| Number of ratings | 3 — better | — |
| Update frequency | Every 20 months | Every 5 months — better |
| Ads | Yes | No — better |
| In-app purchases | No | No |
| Monetization | Ad-supported | — |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 11.0 — better | 26.2 |
| Further details — not scored | ||
| Size | 18 MB | 1 MB |
| Age rating | 4+ | 4+ |
| Developer | Jibiki Works | Yuta Nishimatsu |
In-app purchases
555 Calc
No in-app purchases
Bode Plot
No in-app purchases
Questions
Is 555 Calc free?
Is Bode Plot free?
Do 555 Calc or Bode Plot have ads?
Which is updated more often, 555 Calc or Bode Plot?
Other comparisons
