Past Code vs Periodic Table Watch
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Past Code
Instantly find mark schemes for IGCSE and A-Level past papers by scanning their codes with your camera. Save time and effort by accessing the correct resources directly.
- Scan past paper codes with camera
- Instant mark scheme retrieval
- Supports IGCSE papers
- Supports A-Level papers
- User-friendly interface
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Stop wasting your time and effort looking for mark schemes online. With the help of Past Code, you can use your camera to scan any IGCSE or A-Level past paper code and find the mark scheme associated with it instantly. For further information you can email us at omarayyanapps@hotmail.com or at my personal email omarayyan@hotmail.com A Omar Rayyan Production Copyrighted 2021
Periodic Table Watch
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Two different Periodic Table clocks displays: The simple clock display shows the Atomic Number and either Atomic Weight or Name. Colors indicate Phase: Solid, Liquid, or Gas. Tap to toggle seconds on or off; long-press to switch between Atomic Weight and Element Name. The Complete clock display shows all available information about each element. There's also a scrollable reference view that shows all of the elements, which can be set up as flashcards to test your knowledge.
Screenshots
Verdict
The clearest difference is price: Past Code at Free against Periodic Table Watch's $0.99. Past Code also leads on update cadence (every 6 days vs every 9 months) and iOS requirement (14.0 vs 26.0). On ads, 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
Past Code is free to download; Periodic Table Watch costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Past Code ships an update every 6 days, Periodic Table Watch every 9 months. The most recent releases landed on September 26, 2026 and September 30, 2026 respectively.
| Parameter | Past Code | Periodic Table Watch |
|---|---|---|
| Price | Free — better | $0.99 |
| Rating | 4.0 (4 ratings) — better | — |
| Positive reviews | 50.0% of reviews | — |
| Number of ratings | 4 — better | — |
| Update frequency | Every 6 days — better | Every 9 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod — better | iPhone, Apple Watch |
| Requires iOS | 14.0 — better | 26.0 |
| Further details — not scored | ||
| Size | 32 MB | 6 MB |
| Age rating | 4+ | 4+ |
| Developer | Omar Rayyan | Jim Haungs |
In-app purchases
Past Code
No in-app purchases
Periodic Table Watch
No in-app purchases
Questions
Is Past Code free?
Is Periodic Table Watch free?
Do Past Code or Periodic Table Watch have ads?
Which is updated more often, Past Code or Periodic Table Watch?
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