SilverTimer vs Coda
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
SilverTimer
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Anyone who has ever dealt with the production of colloidal silver knows the "problem" based on the amount of water to be treated and the desired PPM to determine the required switch-on time for electrolysis. This app takes the determination of this value on the basis of tables and calculates it accordingly after entering the values for the water quantity and the PPM. After pressing the start button, a counter starts to run down. At the end, when the desired PPM are reached, you will receive a notification. The operation is largely self-explanatory. Apple Watch is also supported. If you have any questions, please visit my support page.
Coda
This program uses targeted tongue, mouth, and facial muscle exercises to help improve snoring and mild to moderate sleep apnea. Developed by sleep specialists, it offers an 8-week program with daily routines designed to strengthen airways and reduce sleep disturbances.
- Targeted tongue, mouth, and facial muscle exercises
- 8-week program developed by ENT physicians
- Daily 10-minute exercise routines
- Automatic exercise time recording
- Proven effective for adults and children
- Alternative to surgery and CPAP therapy
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Coda guides you through tongue, mouth and facial exercises and records your progress. Follow an 8-week program with 8 daily exercises. Hold each movement for 10 seconds and repeat it 5 times. Use the exercise photos, timer, reminders and weekly records to keep track of your practice. Coda does not diagnose or treat disease and is not a substitute for medical care. Consult a doctor about snoring or sleep apnea. Support: https://pentarab.com/coda Privacy Policy: https://pentarab.com/coda/privacy
Screenshots
Verdict
The clearest difference is price: SilverTimer at Free against Coda's $4.99. SilverTimer also leads on device support (4 vs 1) and iOS requirement (13.0 vs 17.0). Coda's advantage is update cadence (weekly vs every 30 months). On ads and in-app purchases 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
SilverTimer is free to download; Coda costs $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.
SilverTimer ships an update every 30 months, Coda weekly. The most recent releases landed on September 14, 2026 and September 21, 2026 respectively.
| Parameter | SilverTimer | Coda |
|---|---|---|
| Price | Free — better | $4.99 |
| Rating | — | 4.0 (1 ratings) — better |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | — | 1 — better |
| Update frequency | Every 30 months | Weekly — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | — | Paid |
| Devices | iPhone, iPad, iPod, Apple Watch — better | iPhone |
| Requires iOS | 13.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 23 MB | 3 MB |
| Age rating | 4+ | 17+ |
| Developer | Joerg Holzapfel | Pentarab |
In-app purchases
SilverTimer
No in-app purchases
Coda
No in-app purchases
