CREDO Detector vs V
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
CREDO Detector
This app enables citizen scientists to contribute to a global cosmic-ray detection network. By using your device's camera, you can help researchers study rare cosmic-ray phenomena, advancing our understanding of cosmology and astrophysics.
- Cosmic-ray particle detection
- Global citizen science network
- Uses device camera matrix
- Publicly available code
- Contributes to astrophysics research
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What is CREDO Science? Cosmic-Ray Extremely Distributed Observatory (CREDO) — Citizen Science collaborative project which enables a strategy for a global analysis of cosmic-ray data to reach the sensitivity to extremely extended cosmic-ray phenomena, we call them Cosmic-Ray Ensembles (CRE), invisible for individual detectors or observatories. So far, the cosmic-ray research has been oriented on detecting single air showers only, while the search for CRE is a scientific terra incognita. We aim at exploring this uncharted realm. Observation of CRE would have an impact on cosmology, fundamental particle interactions and ultra-high energy astrophysics. A large role in the CREDO project is the CREDO Detector mobile app, which uses the camera's matrix to register cosmic-ray particles. By creating a network of users around the globe, we get a cosmic-ray telescope the size of the whole Earth. All application code is public and available on our GitHub. CREDO is an open Citizen Science collaborative project and all collected data are public. In the project participate schools and institutions from 5 continents. If you think your school should join the program, contact us at contact@credo.science. If you have an idea and desire to implement it, you are welcome to join us!
V
Explore molecular geometry and angles using a visual aid for VSEPR theory. Build 3D molecular models and observe repulsion figures, molecular geometry, and angles based on the Lewis model.
- Build 3D molecular models
- Observe repulsion figures
- Display molecular geometry
- Visualize bond angles
- Supports VSEPR theory
- Based on Lewis model
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Build and observe to come true with figures of repulsion, geometry, angles. V-SPER, free application, is a support for the teaching of the VSPER theory (Valence Shell Electron Pair Repulsion). This theory makes it possible to predict the geometry of molecules from the sole electrostatic repulsion of valence electron pairs. It is based on the Lewis model of distribution of the valence electrons of the atoms concerned. The latter is a prerequisite to take full advantage of V-SPER. The molecule is denoted AXnEm. The atoms (or portions of molecules) linked to the central atom A are denoted X (n: number of X, whether they are linked by single or multiple bonds). The non-bonding electron pairs belonging to the central atom A and not being involved in bonds are denoted E (m: number of E). V-SPER allows to build simple and 3D objects (molecules) and to display the repulsion figure in blue (FigREP), the molecular geometry in yellow (Geom) as well as the angles. Some angles are just modeled and do not always correspond to experimentally measured angles, such as the relative lengths of single or multiple bonds
Screenshots
Verdict
The clearest difference is rating: V at 4.0 against CREDO Detector's 1.4. CREDO Detector's advantage is update cadence (every 2 months vs every 5 months) and iOS requirement (11.0 vs 15.0). On price, review sentiment, ratings volume and ads 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.
V holds the better App Store score, 4.0 against 1.4. Both are backed by a comparable volume of ratings — 5 and 4 respectively. Written reviews split almost evenly too, at 0% and 0% positive.
CREDO Detector ships an update every 2 months, V every 5 months. The most recent releases landed on October 1, 2026 and October 4, 2026 respectively.
| Parameter | CREDO Detector | V |
|---|---|---|
| Price | Free | Free |
| Rating | 1.4 (5 ratings) | 4.0 (4 ratings) — better |
| Positive reviews | 0.0% of reviews | 0.0% of reviews |
| Number of ratings | 5 — better | 4 |
| Update frequency | Every 2 months — better | Every 5 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPod | iPhone, iPod |
| Requires iOS | 11.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 14 MB | 15 MB |
| Age rating | 4+ | 4+ |
| Developer | Michal Frontczak | Joazco |
Customer experience
CREDO Detector
V
In-app purchases
CREDO Detector
No in-app purchases
V
No in-app purchases
Questions
Is CREDO Detector free?
Is V free?
Which has better reviews, CREDO Detector or V?
Do CREDO Detector or V have ads?
Which is updated more often, CREDO Detector or V?
Other comparisons
