# VoltOnoSprint vs OptiSwim BASE

The clearest difference is in-app purchases: OptiSwim BASE at none against VoltOnoSprint's 4. OptiSwim BASE also leads on update cadence (weekly vs every 3 weeks). VoltOnoSprint's advantage is device support (4 vs 1) and iOS requirement (15.4 vs 17.0). On price and ads there is nothing between them.

Both are free to download. VoltOnoSprint sells 4 in-app purchases, starting at $0.99 per month. OptiSwim BASE asks for nothing beyond the download.

VoltOnoSprint ships an update every 3 weeks, OptiSwim BASE weekly. Both last shipped on October 25, 2026.

## The numbers

| Metric | VoltOnoSprint | OptiSwim BASE |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Weekly** |
| Monetization | Free with in-app purchases | — |
| Size | 73 MB | 5 MB |
| Requires iOS | **15.4** | 17.0 |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [株式会社S-CADE](https://appshunter.io/developer/1621269147) | [LLC. ATHLIVIA](https://appshunter.io/developer/1876379379) |

## What reviewers say

### VoltOnoSprint

[App page](https://appshunter.io/ios/app/voltonosprint/id1541520728)

This app connects to a dedicated server to enable timing measurements using a photoelectric sensor. It facilitates accurate time tracking for various sports and activities.

**Highlights:** Photoelectric sensor integration, Dedicated server connection, Accurate time measurement, Sports timing, CSV data export

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1ユーザー+CSV出力プラン | $0.99 | per month |
| 50ユーザー+CSV出力プラン | $3.99 | per month |
| 100ユーザー+CSV出力プラン | $6.99 | per month |
| 1000ユーザー+CSV出力プラン | $9.99 | per month |


### OptiSwim BASE

[App page](https://appshunter.io/ios/app/optiswim-base/id6802260227)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is VoltOnoSprint free?

VoltOnoSprint is free to download, with in-app purchases available.

### Is OptiSwim BASE free?

OptiSwim BASE is free to download, with no in-app purchases.

### Do VoltOnoSprint or OptiSwim BASE have ads?

Neither VoltOnoSprint nor OptiSwim BASE shows ads.

### Which is updated more often, VoltOnoSprint or OptiSwim BASE?

VoltOnoSprint ships an update every 3 weeks, and OptiSwim BASE weekly. Most recently, VoltOnoSprint was updated on October 25, 2026 and OptiSwim BASE on October 25, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*