Red Dot Zero vs Zeryn Precision
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Red Dot Zero
This app provides advanced ballistic calculations for precision shooting. It helps users determine bullet drop, windage, and lead with dynamic environmental adjustments and custom rifle profiles. Aimed at shooters needing reliable data for long-range accuracy.
- Advanced ballistic solver
- Intuitive minimalist interface
- Environmental tracking (altitude, temp, atmosphere)
- Custom rifle and cartridge profiles
- Calculates bullet drop, windage, and lead
Read full descriptionHide full description
Red Dot Zero is the ultimate ballistic companion for precision shooters, hunters, and competitive marksmen. Designed with a premium, dark-mode-first aesthetic, this app takes the guesswork out of long-range shooting by providing fast, reliable data when it matters most. Key Features: • Advanced Ballistic Solver: High-precision calculations for bullet drop, windage, and lead. • Intuitive Interface: Minimalist design allows for rapid data entry so you can focus on your target, not your screen. • Environmental Tracking: Dynamic adjustments based on altitude, temperature, and atmospheric conditions. • Custom Profiles: Save and manage multiple rifle and cartridge configurations for instant access at the range. Whether you're zeroing your rifle or calculating a complex solution in the field, Red Dot Zero provides the professional-grade tools you need to hit your mark with confidence.
Zeryn Precision
Read full descriptionHide full description
Dope you can trust — whether you shoot a $400 rimfire with iron sights or a custom rig at 1,000 yards. Zeryn Precision is a data app built by shooters, for shooters. It replaces the notebook, the shoebox of range cards, and the guesswork with one place that tracks your rifles, your loads, your groups, and your barrel — and teaches you every concept along the way. Precision doesn't have to cost a fortune. YOUR RIFLES, SET UP PROPERLY Add your rifle and optic once — about five minutes. Scopes or open sights: blade, aperture, globe, ghost ring. Zeryn takes iron sights seriously, so your lever gun gets the same treatment as a match rifle. DOPE YOU CAN DIAL Zeryn builds a full dope table for your rifle and load — drop, wind, spin drift — in MOA or mils, out past 1,000. Then True Your Dope: tell it where your shots actually landed and it corrects the table to match your rifle in the real world. Book numbers get you close. Trued dope gets you hits. QUICK DOPE No profile yet? Pick a caliber and a factory load and get a working table in seconds — honest about its limits, with a clear path to a trued profile when you're ready. FIND WHAT YOUR RIFLE LIKES Run a factory ammo shootout: pick contenders from a library of 1,500+ factory loads, shoot a group per ammo on any target you like, and log the numbers. Zeryn picks the winner and graduates it into a Load — dope table and all. Stop buying bulk before you know it shoots. BUILD YOUR HANDLOAD Full load development workups — charge ladders and seating-depth steps. Shoot your steps on any target, log your groups and ES/SD, and graduate the winning node into a Load. Custom projectiles are welcome, with a BC estimator for when the box doesn't tell you. WATCH YOURSELF GET BETTER Log groups, browse your group history, and track your barrel over time — round counts and throat erosion — so you see accuracy trends and plan the rebarrel before it costs you. WE TEACH AS WE GO This is the part other apps skip. Every info button in Zeryn explains the concept in plain words — barrel length, sight height, twist rate, focal planes, turret travel — like a mate at the bench, not a physics lecture. A reference library covers BC, throat erosion, jump to the lands, reading wind, and estimating velocity without a chronograph. If you've ever bounced off a ballistics app because it assumed you already knew everything, this one was built for you. WHO IT'S FOR New shooters welcome. Iron sights welcome. The .22 you plink with on weekends counts just as much as a match rig. Rimfire to ELR, hunting rifles to long-range rigs — if you put rounds on paper and want them closer together, Zeryn is for you. Zeryn Precision is free. No account required. Your data stays yours.
Screenshots
Verdict
The clearest difference is ads: Zeryn Precision at none against Red Dot Zero's shown. Red Dot Zero's advantage is update cadence (every 3 weeks vs every 2 months). On price, in-app purchases, device support and iOS requirement 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.
Red Dot Zero ships an update every 3 weeks, Zeryn Precision every 2 months. The most recent releases landed on October 22, 2026 and October 24, 2026 respectively.
| Parameter | Red Dot Zero | Zeryn Precision |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (3 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 3 — better | — |
| Update frequency | Every 3 weeks — better | Every 2 months |
| Ads | Yes | No — better |
| In-app purchases | No | No |
| Monetization | Ad-supported | — |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 15.0 — better | 16.4 |
| Further details — not scored | ||
| Size | 29 MB | 47 MB |
| Age rating | 12+ | 4+ |
| Developer | OLEG STASYUK | Trent Dunn |
In-app purchases
Red Dot Zero
No in-app purchases
Zeryn Precision
No in-app purchases









