THOTH ECG vs SightFrame
Price, ratings, monetisation and update history for both apps, side by side β with what reviewers say about each.
THOTH ECG
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THOTH ECG (wearable dynamic electrocardiogram recorder software) can monitor heart rate for a long time, display dynamic electrocardiogram in real time, and also view heart rate in real time. When the heart rate exceeds the set expected value, there will be a sound reminder to inform, making it a good assistant for your daily life. Function: -View real-time electrocardiogram; -View real-time heart rate; -When the heart rate exceeds the set expected value, there is a sound reminder to inform; Note: This app does not replace seeking medical treatment at a hospital. If you experience any discomfort during the monitoring process, please consult a doctor or professional as soon as possible~
SightFrame
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SightFrame is an interactive vision simulator and eye-care educational tool. Using advanced real-time image processing, SightFrame allows you to see the world through the perspective of individuals with myopia, astigmatism, presbyopia, and color vision deficiencies. KEY FEATURES: 1. Real-Time Camera Simulation β’ Live Diopter Control: Adjust spherical power from 0 to -10.0D+ to observe realistic distance defocus. β’ Astigmatism Effects: Directional blur, streaks, and double-vision glareβespecially in low-light environments. β’ Presbyopia Mode: Central focus difficulty simulating age-related near vision loss. β’ Color Deficiency Filters: Protanopia, Deuteranopia, and Tritanopia color matrix transformations. 2. Realistic Preset Scenes β’ Explore common everyday environments like night driving, classroom blackboards, metro signs, and rainy streetscapes. β’ Switch effortlessly between clear vision and simulated refractive errors. 3. Split-Screen Comparison & Fine Tuning β’ Compare side-by-side (Split View) between normal vision and simulated filters. β’ Fine-tune blur radius, halo intensity, pupil distance, and astigmatism axis angles. 4. Standard Eye Chart β’ Interactive Tumbling E / Snellen chart for eye test exploration and vision awareness. 5. Privacy & Clean Experience β’ 100% On-Device Processing: Camera feed is rendered locally in real time. We NEVER record, save, or upload your photos or videos. β’ No Ads: Enjoy an uninterrupted, seamless visual journey. DISCLAIMER: SightFrame is intended for educational, empathy, and simulation purposes only. It does not provide medical diagnoses or replace professional eye examinations. For any vision concerns, please consult a certified optometrist or ophthalmologist. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is update cadence: SightFrame at every 5 days against THOTH ECG's every 8 months. THOTH ECG's advantage is iOS requirement (13.0 vs 15.0). On price, ads, in-app purchases and device support there is nothing between them.
Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
THOTH ECG ships an update every 8 months, SightFrame every 5 days. The most recent releases landed on October 5, 2026 and October 11, 2026 respectively.
| Parameter | THOTH ECG | SightFrame |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 8 months | Every 5 days β better |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPod | iPhone, iPad, iPod β better |
| Requires iOS | 13.0 β better | 15.0 |
| Further details β not scored | ||
| Size | 5 MB | 32 MB |
| Age rating | 12+ | 12+ |
| Developer | η΄’ζ(θε·)ε»ηη§ζζιε ¬εΈ | δΉ¦ε η° |
In-app purchases
THOTH ECG
No in-app purchases
SightFrame
No in-app purchases









