ND Filter EV vs Wifi Rig CTRL
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
ND Filter EV
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This is a calculator for photographing using ND (Neutral-density) filters with any number of stops. ND STOPS lets you set the exposure without ND filter in a blue field, and see the result below. EV ALTERNATIVES gives you a dual combo alternatives of ISO, APERTURE and SHUTTER SPEED SWEET SPOTS is not always accurate, but in many cases lenses has its sweet spot at about 40% up on the aperture range. SETTINGS lets you choose which stops you want to see in the ND STOPS PAGE and at what EV (exposure value) interval in all pages. To see more apps like this, go to www.discobajas.com
Wifi Rig CTRL
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【WireGuard VPN セットアップ改善】 ・セットアップ中に IP アドレスを変更しても API キー設定が確実に完了するよう修正 ・sudo パスワード入力欄を復活（SETUP Pi 未実施の Pi にも対応） ・API キー設定を sudo 不要の方式に変更（既存 Pi との互換性向上） 【FT8 改善】 ・CQ 送信を複数回行っても1回しか表示されなかった問題を修正 ・Update Pi 後に FT8 デコードが停止する問題を修正（SSE 再接続時に自動再開） ・mfsk-decode 未ビルド時のアラートが再接続後も消えない問題を修正 【Raspberry Pi セットアップ改善】 ・SETUP Pi 完了後に「次に UPDATE 画面で Update Pi を実行」と案内表示 ・Update Pi 実行時に mfsk-decode ビルドを自動開始（10〜20 分） ・アプリ内蔵ファイルを SFTP で直接 Pi に転送（GitHub 依存を排除） 【Pi API 更新（要 Update Pi）】 ・USB オーディオ音量初期化で "Master" コントロールにも対応（FT8 TX 出力改善） ・NOPASSWD 設定を強化（daemon-reload・mkdir・tee を追加）
Screenshots
Verdict
The clearest difference is price: Wifi Rig CTRL at Free against ND Filter EV's $0.49. Wifi Rig CTRL also leads on update cadence (every 2 days vs every 4 months). ND Filter EV's advantage is iOS requirement (13.0 vs 17.0). On ads, in-app purchases and device support 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
Wifi Rig CTRL is free to download; ND Filter EV costs $0.49 up front. Neither carries in-app purchases, so what you see is what you pay.
ND Filter EV ships an update every 4 months, Wifi Rig CTRL every 2 days. The most recent releases landed on October 9, 2026 and October 12, 2026 respectively.
| Parameter | ND Filter EV | Wifi Rig CTRL |
|---|---|---|
| Price | $0.49 | Free — better |
| Update frequency | Every 4 months | Every 2 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPod | iPhone, iPad |
| Requires iOS | 13.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 0 MB | 15 MB |
| Age rating | 4+ | 4+ |
| Developer | Stein Erik Nilsen | JIRO UENO |
In-app purchases
ND Filter EV
No in-app purchases
Wifi Rig CTRL
No in-app purchases
Questions
Is ND Filter EV free?
Is Wifi Rig CTRL free?
Do ND Filter EV or Wifi Rig CTRL have ads?
Which is updated more often, ND Filter EV or Wifi Rig CTRL?
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